On the crowded streets of Tokyo, a chilling pattern emerges: a fresh victim appears every Monday at 6 pm on a packed subway train, killed by a hypodermic needle delivering rhodotoxin. In response, the Tokyo Metropolitan Police Department enlists Dr. Setsuko Suma Kaho Minami, a forensic psychiatrist whose extraordinary talent lets her inhabit the killer’s thoughts and emotions by connecting with the victims’ bodies. Through her methodical examinations, she identifies a shared thread among the slain—an intense sense of self-destruction and isolation that ties the victims to a darker, unseen force. The trail points to a calculated predator who seems to know the first victim, Yumiko, rather than a random attacker.
Yumiko’s past reveals a troubling network: she was once part of a cult called the Ultimate Truth Church and underwent deprogramming at a mountain facility known as the Re-Freezing Psychorium. The facility is run by the controversial Dr. Rei Aku Takeshi Wakamatsu, a former lover of Setsuko whose controversial “reverse brainwashing” techniques have sparked intense debate and accusations of mind control. Setsuko seeks his insight, but Aku rebuffs her, causing the investigation to take on a personal edge as the lines between professional duty and past passion blur.
As the murders spread beyond the subway into streets and residential areas, Setsuko’s grip on reality begins to loosen. A warning call from Aku suggests that the killer’s mind could start to manifest within her own. Suspecting a deeper conspiracy, Setsuko questions Aku again, drawn by clues such as his color blindness that she associates with the red clothing of each victim. He claims to love her still, while she accuses him of cold manipulation. The tension deepens as Aku’s influence appears to echo the victims’ own sense of isolation, forcing Setsuko to grapple with whether she is chasing a killer or becoming entangled in a dangerous game of control.
Aku’s dark influence expands as Setsuko uncovers disturbing memories: he watches old videotapes of the deprogramming of a cult member named Yuki, who blames herself for her mother’s bee-sting tragedy. The tapes haunt Setsuko, amplifying her paranoia and leading to a crisis point just as another murder seems imminent. On the following Monday, Setsuko stands vigilant at a subway station but collapses after a vivid hallucination involving Aku. While recovering, she receives another call from him, inviting her to the Re-Freezing Psychorium, where he tells her that she is now under his control and that he wants to be with her, regardless of her denial.
When Setsuko arrives, she finds herself locked in a room with a looping television that mocks her autonomy. The prolonged captivity drives her toward the edge, and in a chilling moment she is compelled to tell Aku that she loves him. Yuki Takei [Ryoko Takizawa] enters the room, and Setsuko attempts to escape, only to discover that her husband Tomoo has been killed. The autopsy reveals Tomoo as intersex, a stark reminder of the film’s unsettling focus on hidden identities beneath outward appearances. Setsuko insists to the police that the murders were driven by both her and Aku, and she is committed to a psychiatric hospital as Aku vanishes without a trace.
The pursuit reaches a fever pitch when Setsuko is kidnapped by Aku during a transfer to another facility. In his own chamber, he prepares to kill her, but she lunges with a knife and stabs him. Yuki enters, revealing that she was the true perpetrator of the subway murders—seeking revenge for the way Aku manipulated her. She lunges at them with her needle, aiming to kill both, but Aku musters his influence and coerces Yuki into killing herself by dredging up childhood trauma, saving Setsuko in the process. The police arrive to arrest Yuki as the culprit, and Setsuko, with Aku’s unsettling smile at her side, rests in silence in a moment that blurs the line between victim and victor.
In the end, the film leaves audiences with a relentless meditation on control, memory, and the malleable boundaries between love and coercion. The case closes with a grim sense that the true killer may be the intimate ties that bind the investigators to their own pasts, and with Setsuko left grappling with what it means to be free when another’s hand still guides you from behind.
