Dad's hobby was recording the growth of his daughter, Sumika, with a video camera. What began as innocent documentation gradually turned into filming Sumika naked, then escalated into engaging in physical relations with his own daughter and recording it. His desires grew uncontrollable, leading him to invite acquaintances over to participate and film together, pushing the boundaries further. Along this path, their father-daughter bond deepened into an abnormal, twisted relationship far removed from ordinary family life.