On the verge of her husband's overseas assignment, Yuu temporarily moves back to her parents' home. Her brother-in-law, Tadashi, who resents her for being left alone to care for their bedridden father, offers to help with caregiving—only to forcibly subject her to degrading sexual servitude. As Tadashi and his father relentlessly torment and humiliate her, Yuu gradually loses the strength to resist, enduring their abuse in helpless submission. The film deeply explores the twisted family dynamics hidden behind closed doors and the collapse of human relationships.