Minami and her husband are forced to visit his parents' home. Minami has something troubling her—her father-in-law. She brings up the topic of possibly living with his family in the future with her husband, Kenichi, but his response is cold and distant: "I don't know yet." Amid this tension, her lecherous father-in-law begins making advances toward her. The complicated relationship between daughter-in-law and stepfather grows increasingly intense.