Angel Dust

During the first Monday at 6 pm, a seemingly random young woman is killed on a crowded Tokyo subway by a hypodermic needle containing rhodotoxin. Forensic psychiatrist Setsuko Suma is enlisted by the Tokyo Metropolitan Police to help solve the case, and she begins analyzing the victims to uncover the killer's pattern. The killing method and timing hint at a ritualized, methodical serial killer preying on vulnerable individuals.

Autopsies show that the victims harbor strong feelings of self-destruction and isolation. Setsuko concludes that the killer may have known the first victim, Yumiko, suggesting a personal connection behind the seemingly random murders. This insight shifts the investigation from a purely random spree to a targeted pursuit of a personal motive.

Investigators learn Yumiko was a former member of the Ultimate Truth Church who was deprogrammed at a mountain facility called the Re-Freezing Psychorium. The facility is run by disgraced psychiatrist Dr. Rei Aku, Setsuko's former lover. This revelation links Yumiko's past to Aku and raises questions about his role in the case.

Setsuko visits Aku to ask for information about Yumiko and the case, hoping to uncover a connection. Aku rebuffs her inquiry, signaling a cooling or antagonistic stance and foreshadowing a deeper entanglement between them. The tension between the two characters mirrors the murky boundary between professional and personal motives.

The killings begin to occur outside the subway, on residential streets and in urban areas, as the killer expands the target sphere. Setsuko notes the same chilling precision and psychological manipulation in these later victims as in Yumiko, suggesting the killer's reach or the killer's influence extends beyond transport hubs. The urban environment becomes the new stage for the serial killings.

Aku tells Setsuko that because of her research, the killer's mind will start to manifest inside her, blurring the line between investigator and victim. This warning makes Setsuko paranoid and unsettled, deepening the psychological pressure of the case. The threat foreshadows a future confrontation where personal vulnerability could be weaponized.

Setsuko notices that Aku's color blindness connects him to the red clothing worn by all the victims, including Yumiko, hinting at a thematic link between him and the murders. She also recognizes that Aku's isolation mirrors the victims' own feelings, which fuels her suspicions about his involvement. The color motif becomes a psychological clue in the investigation.

Aku's old videotapes show the deprogramming of cult member Yuki, who blames herself for her mother's death in a bee-sting incident. The footage foreshadows how manipulated memories can drive someone to murder, a theme that becomes central to the killer's psychology. Yuki's story hints at the danger of mind control and false narratives.

On the next Monday, Setsuko stakes out the subway to prevent another murder but collapses after a hallucination of Aku approaching. During recovery she dreams of Aku and later receives a call directing her to return to the Re-Freezing Psychorium. The incident marks a turning point where her own mind becomes entangled with the killer's machinations.

Setsuko arrives at the Re-Freezing Psychorium and is locked in a room with a looping television playing Aku's taunts about free will. The prolonged captivity drives her to question her autonomy and her relationship with Aku. We witness the power of manipulation as she is forced to confront her own feelings toward him.

After Setsuko tells Aku she loves him, Yuki enters the room and Setsuko escapes through the unlocked door. When she returns home, she discovers that her husband Tomoo has been murdered; the autopsy later reveals Tomoo was intersex. The events heighten the sense that the killer's influence has reached home and family life.

Setsuko informs the police that the killings were conducted by both her and Aku, and she is committed to a psychiatric hospital for treatment. Aku disappears without a trace, leaving the case unresolved and his intentions unclear. The authorities frame Setsuko's confession as a breakdown under duress, while the true mastermind fades away.

While being transferred to another hospital, Setsuko is kidnapped by Aku and brought to his facility, where he intends to kill her. The abduction reveals a new phase of his control, as he manipulates and traps her in his own space. The power dynamic shifts from investigation to survival as Setsuko fights for her life.

In the confrontation, Setsuko stabs Aku to stop him, and Yuki reveals that she was the subway killer all along. Aku subdues Yuki and convinces her to kill herself by evoking her childhood trauma, having implanted the false memory of her mother's death to control her impulses. The revelation confirms the killer's control over memories as a weapon.

Police arrive and declare Yuki the perpetrator of the serial murders, ending the manhunt for the subway killings. Setsuko lies exhausted in Aku's arms as he smiles, a disturbing image of his control and detachment. The film closes on the uneasy partnership and the cost of truth-telling.