A psychological thriller of a grieving mother turned cold-blooded avenger: Moriguchi Yuko is a middle school teacher whose four-year-old daughter has been murdered by two of her students. She comes to a decision to leave the school but, before she does, she makes a shocking confession to her class, telling them that she has an elaborate plan for vengeance to pay back those who were responsible for her daughter's death and that she has already taken steps to ensure the criminals will not go unpunished.
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