After losing her husband in an accident, Yuka devoted her life to raising her son Jun alone. Her efforts seemed rewarded when he joined a prestigious company, married, and settled into a happy life. But his wife Alice refuses to do housework and spends every day partying. When Yuka comes home to find Alice drinking with male friends in the house, she finally explodes and scolds her. Alice responds with a vicious grudge, conspiring with the men on a plan to sexually humiliate Yuka inside her own home and break her into submission.