Yuko Moriguchi (Takako Matsu), a junior high teacher, announces she will resign. She reveals that her daughter, Manami, was killed by two pupils in her class, whom she dubs Student A and Student B . Her disclosure of their behavior soon reveals their identities. She admits injecting her dead husbands HIV contaminated blood into the milk cartons that the murderers have just drunk from. The rest of the film describes the aftermath of this event in a series of first-person narratives from the two students, Moriguchi, and others.

A psychological thriller of a grieving mother turned cold-blooded avenger with a twisty master plan to pay back those who were responsible for her daughter's death

A psychological thriller of a grieving mother turned cold-blooded avenger with a twisty master plan to pay back those who were responsible for her daughter's death

A psychological thriller of a grieving mother turned cold-blooded avenger with a twisty master plan to pay back those who were responsible for her daughter's death

A psychological thriller of a grieving mother turned cold-blooded avenger with a twisty master plan to pay back those who were responsible for her daughter's death

A psychological thriller of a grieving mother turned cold-blooded avenger with a twisty master plan to pay back those who were responsible for her daughter's death