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What is the plot?
The 13 heroes are sent to the southern region to challenge Clevatess, one of the Four Lords of Dark Beasts, but they are completely wiped out. In response to humanity's attack on his lands, Clevatess launches a devastating assault on the Kingdom of Hiden, cutting down people and laying waste to the capital as he advances through the city.
During the destruction, Clevatess reaches the royal area and encounters a dying woman who is holding a newborn child. The woman begs him to spare the baby and take it away so it can live, and Clevatess, still seething at humanity but moved enough to accept the child, takes the infant with him instead of killing it. He names the baby Luna and decides to raise it as an experiment to determine whether humanity is truly irredeemable.
Clevatess then revives one of the slain heroes, Alicia Glenfall, binding her to his will so she must serve him. Alicia awakens furious that she has been brought back by the Dark Beast Lord and made to obey him, but Clevatess tells her that she will help care for Luna while he watches humanity more closely. To hide his true identity and operate in human society, Clevatess changes into the form of a young boy named Klen, which leaves him in a weaker state than his true beast form.
Klen and Alicia begin traveling with the baby, but Alicia quickly learns that their situation is even more dangerous than it first appeared because they have been captured by slave traders known as the Crows. They are taken to the Crows' hideout, where Alicia is separated out and brought before the boss while Klen is forced into the kitchen to work. In the kitchen, Klen meets the slave girl Nell and the kitchen owner Carme, and the tense arrangement establishes that they are trapped among people who do not know what Klen really is.
A blind bandit named Fleeto threatens to rape Alicia, turning the already unstable captivity into an immediate physical danger. Alicia prepares to defend herself, and Klen's hidden nature and the violence around them force the group into another confrontation as the escape-from-captors sequence unfolds. The Crows' hideout becomes the center of a larger clash between Alicia, Klen, and the criminal group, with the protagonists forced to fight their way through the danger rather than simply flee.
After the encounter with the Crows, Klen and Alicia continue with Luna and keep moving through a world that is already reacting to the baby's survival. The story makes clear that Luna is now the central object around which both human and dark-beast politics are turning, and that keeping her alive is the key choice driving Clevatess's experiment.
As the journey continues, the group reaches the point where Alicia's sword, her former weapon Waterfall Cutter, has been confiscated, and she searches for it in Broco's room. While looking through the room, she finds not only the sword but also hidden gold and a leather cuirass, showing that the room contains secret valuables beyond the weapon she came for. Before she can fully act on that discovery, Klen suddenly enters, interrupting her search and forcing another immediate interaction between them.
A major new figure, Gart, is introduced as a powerful Dark Beast who can also maintain a human form, making him a direct parallel to Clevatess in method even if not in intent. His presence expands the conflict beyond a single group of pursuers and shows that human disguise is a tool used by more than one dark power.
At the same time, Alicia learns a personal truth that changes the direction of her revenge: Drel is identified as the person responsible for her father's death. This revelation ties her private grief directly into the larger war, and it reframes her struggle from a broad heroic duty into a much more personal confrontation with the man behind the killing.
Meanwhile, the human armies learn that Luna is still alive, which immediately raises the stakes around the child and makes her a target for larger military action. Once Drel learns Luna's last known location, he sends the powerful wizard Meynard after her, turning the baby's survival into an open pursuit and signaling that the next phase of the conflict will be a race between hunters and protectors.
Clevatess's stance toward humanity shifts from open revenge to suspended judgment: he sets aside his immediate destruction of humanity so he can decide whether the species is worth saving by watching how Luna develops. That choice turns the story into a long trial of human nature, with Alicia trapped in the role of unwilling guardian and Clevatess himself choosing restraint only because he wants an answer before he annihilates everyone.
As the season continues, the underlying political conflict sharpens around the weakened kingdom and the only forge capable of producing the heroes' weapons, while neighboring powers prepare to move against Hiden. The conspiracy expands beyond survival on the road and becomes a struggle over the future balance of power in the region, with Luna remaining at the center of the danger.
The season's endgame reveals that General Drel is the real villain behind the larger corruption and that he is preparing an extreme final plan. In his final push, he sacrifices his own humanity to transform himself into a weapon, doing so in order to guarantee victory over Clevatess and to carry out an endgame that is tied to the Haiden Forge and the destruction of the world.
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What is the ending?
Clevatess's ending centers on Alicia's final battle with General Drel, Clevatess's growing uncertainty about what he has done, and a later time skip showing Luna being raised as the future of the world. By the end of season 1, the immediate war is over, Drel is defeated, and Clevatess, Alicia, and Luna are still alive as the story turns toward rebuilding rather than destruction.
Alicia meets the end of the season in direct combat with General Drel, who has sacrificed his humanity and turned himself into a weapon to force victory. She wins by shattering his Regalia, and that act exposes the grotesque result of what Drel has made himself into. In the same stretch of the finale, Clevatess defeats Betty the troll, and then uses Betty's corpse to revive Nelluru, restoring her to life after the fight. After Alicia challenges him, Clen chooses to help humanity instead of standing apart from it, and that choice marks the story's movement away from simple revenge and toward survival and reconstruction. The final time skip shows Clen and Alicia tutoring the young Luna, with the nation being restored after the conflict, and the season ends with that future firmly in view.
Here is the ending in a short, simple narrative form:
Alicia defeats General Drel, and his final transformation collapses under her attack. Clevatess survives the battle, helps bring Nelluru back, and then turns toward helping humanity. In the time skip, Alicia and Clen are seen raising and teaching young Luna as the world begins to recover.
Scene by scene, the ending unfolds like this:
The finale opens on the final stretch of the war, with General Drel pushing himself beyond humanity and turning his own body into a weapon in order to guarantee victory over Clevatess. He is no longer fighting as an ordinary man; he has thrown away the human side of himself and embraced that monstrous form as his last attempt to force the outcome he wants.
Alicia steps into the decisive clash with Drel and fights him to the finish. She does not win by raw force alone; she wins by destroying the Regalia that sustains him, and when that power is shattered, the truth of what he has become is laid bare. His death is not clean or noble; it is shown as the result of the terrible shape he chose for himself.
At the same time, Clevatess completes his own major fight by defeating Betty the troll. After that, he uses Betty's corpse to revive Nelluru, bringing her back into the story after her death. This is one of the season's clearest concrete reversals of loss: one body becomes the means to restore another life.
Once the fighting settles, Clevatess is no longer only the beast king who began the story in revenge. After Alicia challenges him, he chooses to help humanity. That choice places him on the side of preservation and rebuilding rather than annihilation, and the finale leaves him in a changed position from where he began.
The final movement of the season is a time skip. In that later scene, Clen and Alicia are shown tutoring young Luna, and the nation is being restored. Luna's place at the center of the future is clear: she is being raised as the child whose life has remained tied to the fate of the human world. The season closes on that image of education and restoration rather than on another battlefield.
The fates of the main characters at the end are:
Alicia: alive, victorious over General Drel, and later seen helping teach Luna.
Clevatess / Clen: alive, changed by the ending, helping humanity instead of remaining only in revenge.
Luna: alive, present in the time skip, and being raised as the future hope of the restored nation.
Nelluru: revived after Clevatess uses Betty's corpse to bring her back.
General Drel: defeated and killed after Alicia shatters his Regalia.
Betty the troll: defeated by Clevatess and left dead, with her body used in Nelluru's revival.
The season ends with the war resolved for the moment and the story shifting into a future shaped by Luna's upbringing and the uneasy alliance between Alicia and Clevatess.
Who dies?
Yes. In Clevatess season 1, several characters die, and some of those deaths are later reversed or complicated by dark magic, resurrection, or body manipulation.
- Alicia Glenfall is killed by Clevatess early in the story as one of the thirteen heroes sent against him, but she is later revived and bound to him by dark magic, so her "death" functions as the trigger for her undead state rather than a permanent exit from the story.
- Stefan is murdered by Clevatess as part of the slaughter of the thirteen heroes.
- Mirlo is also murdered by Clevatess during that same initial conflict with the heroes.
- The King of Haiden is killed by Clevatess after launching an attack on Clevatess's lands; he is later revived by Haiden's forge, making this another death that is not final.
- Betty, Broco's pet troll, is killed by Clen/Clevatess so her corpse can be used to revive Nelluru.
- Margo dies from wounds sustained in combat; according to the recap, he refuses to retreat, injures the dragon with Dragonfly, is mortally wounded, and loses his foot before dying.
- Durell dies in the season's later battle after Alicia coordinates a final push, breaks his weapon, and he finally dies while thinking of Margo.
There are also broader statements in the series coverage that "all the heroes die" in the failed mission, but the detailed character list available in the source only explicitly names Alicia, Stefan, and Mirlo among those hero deaths.
Is there a post-credit scene?
Yes. Clevatess has a post-credit scene in episode 1, and it is important because episode 2 begins directly from it.
In that scene, Alicia wakes up and realizes that she, Clevatess, and Luna have been captured and are being transported in the back of a wagon with other prisoners. The moment also shows Clevatess in an unusually vulnerable state: because he is no longer in his usual dark beast form, he is physically much more fragile than he expected humans to be, which is part of why the capture works at all. The wagon is clearly being used to move hostages or captives, and the setup leads into the next episode's opening situation.
If you want, I can also describe the episode 1 end scene and the episode 2 opening as a single continuous sequence.
What is Klen’s curse, and how does it affect Alicia?
Klen's curse is placed on Alicia after Clevatess resurrects her with his blood, binding her to him and making her part of his plans rather than a free agent. The key story effect is that Alicia survives what should have been her death, but the resurrection comes with a supernatural restriction that shapes her actions and relationship with Klen throughout the season.
Why does Clevatess adopt baby Luna after destroying the kingdom?
Clevatess takes in baby Luna as an experiment to test whether humanity can be worth saving, after a survivor's plea leads him to spare the orphaned child from the ruins. The baby becomes the emotional center of his changed course, because his decision to protect Luna pushes him toward observing humans more closely instead of simply exterminating them.
How does Alicia get resurrected, and what role does Clevatess play in it?
Alicia is resurrected by Clevatess through his blood after she is killed in the initial conflict. He brings her back not out of mercy, but because he needs her to help him care for Luna and to serve his broader purpose of examining humanity.
Who are the Crows, and what happens when Alicia and Klen are captured by them?
The Crows are a specific faction that becomes important once Alicia and Klen are seized by them, turning their situation into a major plot setback and forcing them into direct danger. Their capture becomes one of the season's concrete character-and-faction conflicts, rather than a broad worldbuilding detail.
Who is General Drel, and what role does he play in the story?
General Drel is a major villain whose conflict with Alicia becomes one of the season's key character showdowns. In the finale, Alicia defeats him by shattering his Regalia, exposing the gruesome truth of his death and ending his immediate threat.
Is this family friendly?
No, Clevatess is generally not family friendly for children, and it is best treated as mature-viewer content. Its parental guidance listings describe severe violence and gore, moderate sexual content/nudity, moderate profanity, and severe frightening/intense scenes, with ratings such as TV-MA and R-17+ depending on the source.
Potentially upsetting or objectionable material includes:
- Graphic violence and gore: dismemberment, decapitations, torn-apart bodies, and blood shown in detail.
- Sexual violence implications: references or implications of rape, sex slavery, or abuse offscreen.
- Nudity and breastfeeding-related scenes: visible breasts in non-sexual contexts, including breastfeeding.
- Intense, disturbing atmosphere: repeated death, suffering, and other emotionally heavy scenes that may be frightening for sensitive viewers.
- Profanity and crude material: moderate language and some suggestive/fan-service elements reported by reviewers.
If you are deciding for a child or a sensitive teen, the safest answer is no; it is more appropriate for older teens and adults who can handle graphic dark fantasy content.