Chloe Taylor, editor-in-chief of the feminist magazine The Real Thing, lives in Manhattan with her husband Adam Macintosh, a successful lawyer, and their teenage son Ethan. The family also owns a second home in the Hamptons. Chloe's life appears glamorous and controlled, but beneath the surface, her marriage is strained, and she faces escalating, violent threats at work due to her magazine's outspoken stance.

One evening, while at their Hamptons home, Chloe returns late to find Adam lying dead in a pool of blood in their living room, stabbed to death. The police quickly focus on Ethan as the prime suspect when his DNA is found under Adam's fingernails, and he is arrested for his father's murder.

The investigation reveals a family secret: Ethan is actually the biological son of Chloe's estranged older sister, Nicky Macintosh, and Adam. Years earlier, after Nicky--struggling with alcoholism--was found passed out drunk by a swimming pool with baby Ethan nearly drowning beside her, Adam gained full custody, and Chloe later married Adam and raised Ethan as her own. The police contact Nicky, now sober and living in Ohio, to take custody of Ethan during the trial, but Chloe, distrustful of Nicky's past and current stability, resists this arrangement.

As Ethan's trial proceeds, Chloe and Nicky are forced into an uneasy reunion. Chloe, desperate to protect Ethan, hires a lawyer recommended by Jake Rodriguez, an attorney at Adam's firm with whom she has been having an affair. Nicky, meanwhile, is determined to reconnect with her son and prove her reliability, attending AA meetings and building a tentative relationship with a man named Ken.

During the investigation, Detective Nancy Guidry and her partner Matt Bowen uncover that Adam and Jake were being blackmailed by FBI agent Edward Olivero over their involvement in a human trafficking case connected to their law firm's founding partner, Bill Braddock. Chloe, leveraging her magazine's resources, begins to investigate these threats and the possible motives behind Adam's murder, suspecting a connection to her work or Adam's legal dealings.

Ethan, under intense pressure, eventually confesses to Nicky that Adam had been physically abusing him. Distraught and enraged, Nicky drives from Ohio to the Hamptons, deliberately leaving her phone behind to avoid being tracked. She confronts Adam at the house. An argument escalates into a physical altercation; Adam attacks Nicky, and in self-defense, she stabs him with a knife, killing him. Panicked, Nicky flees the scene, leaving the knife behind, and returns to Ohio to establish an alibi.

After Ethan is released due to insufficient evidence, Nicky confesses the truth to Chloe. The sisters, now bound by their shared secret and desire to protect Ethan, decide to frame Bill Braddock for Adam's murder. Chloe retrieves the knife she had hidden after the crime, and together they plant it in Braddock's office. They also gather evidence of Braddock's involvement in the human trafficking ring, ensuring his arrest.

With Braddock in prison, Chloe and Nicky use the magazine to expose misconduct by Detective Guidry, who had mishandled Ethan's case, resulting in her removal from the investigation. The sisters reconcile, co-parenting Ethan and collaborating on a book about their experiences. The series ends with the family beginning to heal, the truth about Adam's death concealed, and Braddock facing justice for his crimes.

The Better Sister season 1 ends with the revelation that Nicky, Chloe's sister and Adam's ex-wife, is the one who killed Adam. Despite the murder, Chloe and Nicky reconcile and agree to co-parent Adam's son, Ethan, together. The final scene shows the two sisters sitting on a beach, closer than ever, discussing their shared story and future.

Expanding on the ending scene by scene:

• Early in the finale, it is revealed that Nicky killed Adam. This comes as a shock since Adam was a successful lawyer and the seemingly perfect husband of Chloe.

• Detective Nancy Guidry uncovers the truth after interviewing Adam's mother and learning that Nicky had told Adam's mother-in-law that Adam had been stabbed--a detail only the murderer would know at that point.

• Meanwhile, Adam's son Ethan is initially suspected of the murder, but the suspicion shifts as the truth about Nicky emerges.

• The media brands Chloe and Nicky as "sister wives," highlighting the complicated family dynamics and public scrutiny they face.

• The sisters, who had been estranged, put aside their pain and reconcile. They agree to co-parent Ethan together, showing a new bond formed through shared tragedy.

• The final scene takes place on a beach, a place tied to their childhood memories. Chloe and Nicky sit together, talking about writing a book about their experiences. Chloe tells Nicky, "I don't have any story without you, not worth telling anyway," emphasizing their renewed connection.

• The beach setting and their conversation about the Big Dipper constellation symbolize finding their way together after being lost for so long.

• Regarding the fates of the main characters involved at the end: Nicky is alive but burdened by her secret; Chloe is alive and reconciled with Nicky; Ethan is alive and will be co-parented by both sisters; Adam is dead, the victim of Nicky's murder.

• Additionally, a character named Jake is found dead washed up on shore, suggesting ongoing dangers related to other plot threads involving corrupt figures, hinting at unresolved conflicts beyond the sisters' story.

Thus, the ending unfolds with the murder mystery resolved, family wounds partially healed, and a tentative new beginning for Chloe, Nicky, and Ethan, set against a backdrop of lingering external threats.

The TV show The Better Sister (season 1, "Miniseries," 2025) does not have a post-credit scene. The final episode ends with a scene of the two sisters, Chloe and Nicky, sitting on the beach discussing their future and the possibility of writing a book about their experiences, symbolizing their renewed closeness. There is no mention in any sources of an additional scene after the credits.

The finale focuses on revealing that Nicky killed Adam to protect Chloe, followed by the emotional resolution between the sisters. The story concludes without any extra post-credit content or teaser for future episodes.

Adam Macintosh was killed by Nicky, Chloe's sister and Adam's ex-wife, in self-defense after Adam attacked her. Nicky then fled the scene and later confessed to Chloe. Together, they framed Bill Braddock, Adam's boss, for the murder to protect themselves and expose his criminal activities.

Chloe and Nicky are sisters. Adam was married to Nicky and later married Chloe. Ethan is Adam and Nicky's son, but Chloe is raising him. The complex family dynamic is central to the plot, with Chloe having married Adam after betraying Nicky years earlier.

After Adam's death, Chloe is questioned by detectives and Ethan, Adam's son, is arrested because his DNA was found under Adam's fingernails. The police contact Nicky, Ethan's biological mother, who becomes his legal guardian. Chloe is interrogated extensively, and the investigation reveals family secrets and leads to framing Bill Braddock for the murder.

Bill Braddock is Adam's boss and a villainous character involved in a human trafficking ring. Chloe and Nicky plant the murder weapon in his office and gather evidence against him, leading to his arrest. This framing serves as a key plot device to resolve the murder case.

Initially estranged, Chloe and Nicky grow closer as they confront the murder investigation and family secrets. Nicky drives from Ohio to confront Adam, kills him in self-defense, and confesses to Chloe. They collaborate to frame Bill Braddock and later co-parent Ethan, write a book together, and leverage Chloe's magazine to expose police misconduct, ending on a relatively positive note.

The Better Sister, season 1 (2025), is rated TV-14 and is a drama thriller with moderate violence and gore, moderate sexual content and nudity, severe profanity, mild alcohol/drug use, and mild frightening or intense scenes, making it not fully family-friendly for young children or very sensitive viewers.

Potentially objectionable or upsetting aspects include:

• Violence and Gore: The story involves a brutal murder and investigation, with some scenes depicting blood and violence.
• Sexual Content and Nudity: There is moderate sexual content and some nudity.
• Profanity: The series contains severe use of strong language.
• Substance Use: Mild depiction of alcohol and drug use, including a character struggling with addiction.
• Intense Scenes: Mild frightening or intense moments related to the crime and family drama.

These elements suggest the show is more suitable for teens and adults rather than young children or highly sensitive viewers.