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Rie, who recently married Tatsumura, the heir of a construction company, one day receives a wrong number call. Dissatisfied with her husband, she begins to engage in long phone conversations that eventually lead to phone sex. Around the same time, her husband dies in an accident, followed shortly by the murder of his mother. The police suspect Rie of committing the crimes for the inheritance. However, Rie is summoned by the mysterious voice on the phone and ends up being restrained completely naked in an abandoned building. Her beautiful body slowly falls into a cunningly crafted trap.