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What is the plot?
When Krypton's core ruptures, scientist Zor-El activates an emergency system and, with his wife Alura, shepherds a swath of their people into Argo City. Zor-El channels the city's mass into a protective force field that severs a portion of the planet, isolating the enclave from the catastrophic explosion. Eight years after that salvation, Alura gives birth to their daughter Kara. Over time the fracture that preserved Argo City reveals a hidden mineral: Kryptonite. Radiation from the ore spreads slowly through the enclave, sapping life from the citizens. Alura contracts the poisoning and dies from the contamination. Faced with the city's terminal exposure, Zor-El loads a small spacecraft with his infant daughter and the family's white dog, Krypto, and launches them toward a distant blue world called Earth. The shuttle strikes the planet and Kara emerges onto a new world, where Kal-El--who maintains the human identity of Clark Kent and the vigilante persona of Superman--meets them. Kara struggles to find her footing in human society and soon adopts the mantle of Supergirl.
Years later, Supergirl cruises the galaxy with Krypto at her side, celebrating her twenty-third birthday by visiting multiple worlds and reveling in new experiences. Her cousin Kal-El calls frequently from Earth, his voice threaded with worry; he presses her to settle down rather than drift endlessly among the stars. On one routine stop, she runs into Ruthye Marye Knoll, a gaunt woman who reveals herself as the lone survivor of a family slaughtered by a brigand named Krem, leader of a band of marauders known as the Brigands of the Yellow Hills. Ruthye begs Kara for help and for justice, but Kara refuses to indulge a vendetta and declines to take Ruthye with her.
Krem and several Brigands seize that moment of refusal. They wrest control of Kara's ship through a violent boarding and, as the dog Krypto lunges to defend his mistress, Krem fires a small, tipped dart into the animal's side. The dart contains a venomous compound; the medic readings confirm a grave prognosis: Krypto will not survive more than three days without an antidote. Kara reviews the sparking instrument between her fingers and learns that the reversal serum rests on Krem's person. Driven by urgency, she changes course to hunt the brigand and, though reluctant, brings Ruthye along when the woman insists on accompanying the chase.
While tracking Krem, Kara's ship is waylaid by the Sklarian Raiders, a group of space pirates who attempt to rob them. She fights the raiders in a brief skirmish, subdues the attackers, and forces information from their leader. The interrogated raiders admit they have seen Krem operating near Bilquis, a dusty, lawless planet where the Brigands have established bases. Kara navigates to Bilquis and there encounters a local couple, Bomar and Mareck. They tell Kara and Ruthye that the Brigands have been seizing young women and forcing them into marriage as brides--an informal trafficking ring that lines the brigands' coffers and bolsters their ranks.
Mareck, under the pretense of hospitality, attempts to slip a sedative into Kara's drink. He intends to render Kara and Ruthye unconscious and hand them over to the Brigands in exchange for the return of his daughter Sarna, who the brigands have taken. Kara resists the treachery after tasting the bitter powder, fights free from Mareck's grip, and a pitched fight breaks out in the town square as Brigands converge on the scene. During the clash, the flesh-and-blood bounty hunter Lobo arrives, carving a path through attackers with bludgeons and blasters. Lobo is pursuing a Brigand lieutenant named Drom Baxton and seizes the opportunity to join the fray. Lobo and Kara drive the brigands into disarray, but the engagement turns deadly when Krem surfaces amid the chaos.
As the battle swells, Ruthye corners Krem and raises a blade to him, intent on killing him for the slaughters he committed. Kara intervenes, seizing Ruthye's arm and arguing that cold vengeance will not bring back the dead. While Kara hesitates, Krem slips free and flees, and in the scramble he murders Bomar and the rest of Bomar's family--shooting them where they stand and leaving their bodies collapsed among the dust. Krem escapes the planet's surface aboard a shuttle. Ruthye stands frozen over the corpses of Bomar's kin while Kara, stricken with guilt for letting Krem flee, abandons the wounded town and sets out in pursuit alone. Local residents, horrified at Bomar's slaughter, provide a small escort and point Kara toward Barenton, a nearby world where the Brigands maintain a shipyard and a floating hold used for trafficking captives.
On the voyage to Barenton, Kara travels under a green sun's spectrum and begins to weaken. The radiation from that star diminishes her strength, slows her reflexes, and leaves her breath ragged. Unbeknownst to Kara, Ruthye has followed in secret and arrives at Kara's landing site. Ruthye tends to Kara's failing body by sheltering her and applying crude but effective remedies; she keeps watch while Kara lies limp. Ruthye's care returns a measure of vitality, but before they can regroup Brigands loyal to Krem seize Ruthye and haul her aboard their cruiser. On the brigand vessel, the bounty hunter Lobo already sits chained in a cell; earlier engagements had led Brigand captors to hold him for ransom. Ruthye slips into a cell, hides, and works through the locks until she slips Lobo free. She and Lobo make their escape toward the deck, carrying improvised weapons and silent intent to recapture Krem, but as they near the surface Krem and his guards intercept them. Ruthye is forced back into custody and yanked onto the deck.
While Ruthye struggles, Barenton completes one of its rotations. The planet's sky shifts from green to yellow as it turns; sunlight of the yellow spectrum floods the landing plain and revitalizes Kara. She rises, suits herself in the Supergirl emblem and outfit she had kept in stasis for just such a contingency, and launches into the air. She bombs through bulkheads and hatches, diverts bolts of energy with her punches, and tears through the Brigands who try to pin her down. Lobo, freed by Ruthye, meets her on the cruiser's gunnels and together they press forward. Lobo uses a chain to pull explosive charges into the brigand ammunition stores; Kara rips the ship's control cables from their mounts and hurls brigands into the vacuum of space. In a series of singled-out engagements, Kara uppercuts a half-dozen assailants into walls, Lobo detonates a corridor to block reinforcements, and Ruthye fights a pair of captors who attempt to drag her back into the brigand brig.
At the top of the ship, Supergirl finds the Brigands' holding rooms where she pries open cages and carries out the young women who have been kept as forced brides. She cuts ropes, opens doors, and ferries survivors past the writhing wreckage of the battle. When she reaches the main deck she sees Ruthye confront Krem again. Kara drops to her knees and pleads with Ruthye, begging her not to take a life in retribution. Ruthye looks at the charred bodies of Bomar's family and steels herself, then turns away without striking. Ruthye walks aft toward the ship's rear and begins to step away from the quay.
As Ruthye turns her back, Kara's gaze fixes on a sword that lies embedded in a deck beam--a long, stained blade used by the brigands to enforce their rule. Kara stoops, grips the hilt, and rises. She storms after Krem as he attempts to leap across the stern to a launch. Krem spins and draws a pistol. Supergirl closes the distance in a heartbeat and drives the sword into him with both hands, plunging the blade through his chest. Blood and the stench of machinery mingle as Krem collapses onto the deck, his pistol clattering away. His chest cave-in gives no second chances; he dies where he falls, gasping breath seizing his throat. Kara drags the sword free and stands over his corpse until the last of his blood ceases to warm her boots.
From Krem's clothing, in a worn satchel sewn into his lining, Kara uncovers the small vial that holds the antidote to the toxin coursing through Krypto's blood. She snatches the vial and races back down into the brigand hull. She reaches Krypto as the animal's eyelids flutter; the dog's breathing is thin and rattled. Kara pierces the vial and presses the antidote against Krypto's lips, forcing a drop into the dog's throat. Krypto coughs, then whimpers, then wags a slow tail as the serum courses through his veins. Within moments his breath steadies. Kara watches him rise to his paws and bark weakly, then fall beside her with a contented thump.
After securing the brigand vessel and loading the freed women into escape pods, Kara and Lobo set the cruiser on a collision course with a remote asteroid field to deprive remaining Brigands of a safe harbor. Lobo rigs the ship to self-destruct its weapon caches while Kara escorts the rescued captives away. Ruthye approaches Kara by the airlock, wiping blood off a sleeve and still trembling from the sight of Bomar's family and Krem's death. Kara speaks softly, telling Ruthye that she could have brought Krem to justice by other means and that killing him does not heal wounds. Ruthye nods but offers no apology; instead she accepts Kara's offer to spend the remainder of the birthday week together. They stand at the airlock as Krypto rests his head on Kara's boot, then board a shuttle and depart.
Some time after the campaign against the Brigands, Supergirl returns to Earth and meets with her cousin. She steps down into the city streets of Metropolis where Kal-El waits, cape folded behind him and his double life as Clark Kent hanging ready. Kara tells him she has considered his counsel and that she wants to plant roots on Earth. She says plainly that she intends to stay for the long term and make the planet her home. Kal-El nods, relieved and pleased, and the two embrace briefly as Krypto leaps up beside them, tail wagging. The final image lingers on Kara looking out over the city skyline--her posture steady, her voice firm as she reaffirms that Earth is where she will remain. The story closes as Kara walks with Kal-El and Krypto into the crowd, the three of them moving forward together.
What is the ending?
Kara defeats Krem, saves Krypto, and returns to Earth. Ruthye does not kill Krem; Kara does it herself, then she chooses to stay on Earth with Superman and Krypto.
At the end, Kara and Ruthye reach the final confrontation after the journey across space. Ruthye is given the chance to kill Krem, but Kara stops her and tells her not to take on that kind of guilt. Ruthye walks away, and Kara takes the sword and kills Krem herself. She then gets the antidote that saves Krypto, who recovers. After that, Kara says goodbye to Ruthye, and Ruthye returns home to live with her aunt and continue the life she chooses for herself. Kara later goes back to Earth, reunites with Superman, and decides to stay there instead of wandering from place to place. Krypto stays with Kara.
Scene by scene:
Kara and Ruthye arrive at the final showdown with Krem and his people. The fight breaks open around them, with the danger of the ship, the captive women, and Krypto all hanging in the balance. Kara pushes through the battle and gets close enough to stop Krem from escaping.
Ruthye is brought face to face with the man who killed her father. She is the one who most wants revenge, and she is given the chance to strike him down. Kara speaks to her and tells her that killing him will not heal her grief. Ruthye listens, lowers herself from the moment, and steps away.
Once Ruthye backs off, Kara picks up the sword and kills Krem herself. The act ends the conflict with him directly. After Krem falls, Kara takes the antidote from him and turns immediately toward Krypto, who is dying from poison.
Kara gives Krypto the antidote, and he survives. The dog's condition changes from near death to recovery, and he returns to Kara alive. With Krem dead and Krypto saved, the immediate danger ends.
Kara and Ruthye then have their farewell. Ruthye leaves the battle behind and goes back to her own life. She returns home to her family and chooses to continue on the path connected to her father's work.
Kara then returns to Earth. She goes to Superman, and the two of them reunite. She tells him that she is done drifting and wants to stay. The film ends with Kara choosing Earth as her home. Krypto is with her, and Superman remains part of that closing moment.
Who dies?
Yes. Based on the available reports on Supergirl: Woman of Tomorrow, multiple characters die, and the deaths happen in a few distinct parts of the story.
- Elias Knoll dies first, murdered by Krem of the Yellow Hills before the main revenge journey begins. This is the inciting tragedy that drives Ruthye's quest and sets the film's revenge plot in motion.
- Delilah Knoll dies with the rest of Ruthye's immediate family when Krem attacks them; this is described as Krem wiping out Ruthye's family after the betrayal and sale to him.
- Emond Knoll dies in the same massacre of Ruthye's family at Krem's hands.
- Alura Zor-El dies in a flashback from Kryptonite exposure after the remains of Argo City become contaminated by Kryptonite following Krypton's destruction. The sources describe this as an earlier death in Kara's past, shown to explain her trauma and history.
- Zor-El dies not long after Alura, along with the rest of Argo City, according to Kara's explanation in the film's flashbacks.
- Bomar Vran dies when Krem kills Ruthye's family after the brigands betray her and Kara; the reports group him among the family casualties of that attack.
- Mareck Vran dies in the same family massacre carried out by Krem.
- Sarna Vran dies in the same alley attack, after Kara frees her and she nearly reunites with her family; Krem kills all three of them there.
- Comet the Super-Horse dies during the final battle after taking a Kryptonite bullet meant for Supergirl. The reports describe this as a tragic sacrifice that happens near the climax.
- Krem dies at the end of the film when Supergirl kills him in the final confrontation. After Ruthye is stopped from killing him, Krem makes a last threat, and Kara stabs him in the throat with his own sword.
A few important clarifications: - Krypto does not die. He is poisoned early in the film, but Kara later gets the antidote and cures him. - Some sources describe the Krem ending differently in the comic context, but the film reports and spoiler summaries agree that in the 2026 movie he is killed by Supergirl.
If you want, I can also lay this out as a scene-by-scene death timeline in the order they happen in the movie.
Is there a post-credit scene?
No. Supergirl: Woman of Tomorrow does not have a post-credit scene or a mid-credits scene.
What the film does instead is place its final character beat before the credits: Kara's emotional choice to stay connected to Earth and her conversation with Superman are part of the movie's ending, not a hidden credits stinger. Several reports also note that a scene some viewers expected to be saved for the credits was moved into the main film itself, so there is nothing extra after the credits begin.
If you want, I can also describe the ending scene that replaces the usual post-credit tease.
Who is Ruthye Marye Knoll, and why does she team up with Supergirl?
Ruthye Marye Knoll is a young alien girl who approaches Kara Zor-El for help after her father is killed and her home is destroyed. She teams up with Supergirl to track down the killer, Krem of the Yellow Hills, and seeks revenge for her family's murder.
Who is Krem of the Yellow Hills, and what did he do to Ruthye’s family?
Krem of the Yellow Hills is the violent warrior Ruthye blames for murdering her father and devastating her home. The story's central revenge mission is built around finding Krem and confronting him for that crime.
How is Krypto involved in Supergirl: Woman of Tomorrow?
Krypto the Superdog travels with Kara during her cosmic journey and is part of the story's core trio in the comic-inspired setup. Several descriptions place him alongside Supergirl as she meets Ruthye and begins the revenge quest across alien worlds.
Why is Supergirl struggling emotionally at the start of the story?
Kara is portrayed as lost, lonely, and looking for purpose because Krypton is gone and her mission to protect her cousin Superman no longer defines her life. Sources describe her as drifting, drinking, and feeling overshadowed by Superman's success, which leaves her in an existential crisis before Ruthye arrives.
What role does Superman play in Supergirl’s story?
Superman matters mainly as the source of Kara's emotional conflict: she feels her life has been defined by being his younger cousin, while he has already become the powerful hero Earth needs. Several sources note that Kara's original purpose was to protect Kal-El, but since he no longer needs that protection, she feels directionless and overshadowed by his fame.
Is this family friendly?
No, it is not especially family-friendly for young children. The film is rated PG-13, and multiple parent-focused reviews describe it as better suited to teens than to kids because of strong violence, coarse language, smoking, and heavy themes.
Potentially objectionable or upsetting elements for children or sensitive viewers include:
- Frequent violence and peril, including intense action, brawls, attacks, and deaths; some reviews say the violence is more serious than cartoonish.
- Strong language, including repeated profanity, with reviewers specifically noting offensive language and "four-letter" swearing.
- Alcohol use and intoxication, with one review noting the heroine spends substantial early stretches drunk, and another flagging alcoholism as a theme.
- Dark traumatic backstory material, including scenes or references involving destruction, death of family members, grief, and traumatic loss.
- Human trafficking / sexual slavery implications, which one parent guide says are heavily implied and potentially disturbing even without explicit on-screen sexual assault.
- Threats and abuse toward young women and children, including peril involving vulnerable characters.
- Smoking and other adult behavior, which is part of the PG-13 rating and noted by reviewers.
If you want, I can also give you a very short "safe for what age?" recommendation based on these notes.