A twisted story of an elderly man and his beautiful adult granddaughter, Erika, as she prepares to become a bride. While caring for her grandfather Tomio, Erika brings her fiancé home. Her father is delighted, but Tomio cannot bear to lose his beloved granddaughter and fiercely objects. Consumed by jealousy, he begins having dreams about sex with Erika, then sexually assaults her in reality. Though shocked, Erika senses his attachment to her and devotes herself to intimate physical care until the day she marries.