Abyss

Cha Min receives a mysterious object called Abyss following a troubling message from his fiancée, while Go Se-yeon encounters a man who claims to be a friend.

Se-yeon struggles to accept the truth about her situation as Min reveals his role in her predicament, and she resolves to uncover the identity of her killer while also finding a way to assist Min.

Se-yeon and Min are shocked by Park Gi-man's recent actions, and they receive unexpected assistance from a police detective who mistakes her for someone else.

Min becomes increasingly anxious after believing he has spotted his ex-fiancée, while Se-yeon attempts to help him see that he has changed since their time together.

Se-yeon, shaken by a disturbing revelation, contemplates using the drug Abyss and enlists Park Dong-cheol's help to continue probing the prosecutor's murder.

Park Dong-cheol pursues Oh Yeong-cheol, who remains one step ahead of law enforcement, while Min's mother becomes increasingly concerned about her son's unusual behavior.

Se-yeon begins to see Min in a new light as she realizes his long-standing support, while Min receives an unexpected revelation from Jang Hui-jin.

Park Dong-cheol confronts Se-yeon about her involvement in the case, while a mysterious woman who claims to be Lee Mi-do unexpectedly arrives.

Se-yeon confronts Min about her recent behavior and shares a heartfelt moment with her estranged mother. Meanwhile, Hui-jin remains resolute when challenged by Min's mother.

Se-yeon begins to sense a potential threat, Min discloses a hidden truth about his father's past, and Hui-jin's mother grows unsettled after witnessing a familiar face on TV.

Min searches for Se-yeon after Park Dong-cheol warns him about Oh Yeong-cheol, while Min's mother makes an unusual offer to Lee Mi-do's parents.

Se-yeon becomes suspicious of Seo Ji-uk's behavior, while Hui-jin receives an unexpected visit that leads her to suspect Oh Yeong-cheol's next move.

While assisting Park Gi-man with an investigation, Se-yeon and Min uncover an unusual clue, and Seo Ji-uk receives an unexpected visitor.

Seo Ji-uk begins executing his plan, while Min faces a troubling phone call from Park Dong-cheol on his way to meet Se-yeon, forcing him to confront a tough choice.

Min and Se-yeon, with assistance from Park Dong-cheol, work to gather evidence against Seo Ji-uk, while Min's mother confronts Se-yeon about her motives.

Se-yeon, after proposing to Min, deals with the emotional fallout of his decision and confronts her parents with the truth about his past. Meanwhile, the trial of Seo Ji-uk begins, marking a pivotal moment in the legal and emotional stakes of the story.