34-year-old beauty Midori-san leaves her part-time job early and returns home, only to discover undeniable proof of her husband's infidelity. That night, she resolves to take her child back to her parents' house and begin living apart from him. Haunted by the betrayal she suffered in her own home, Midori plans an act of revenge: cheating in the very house where her husband betrayed her. While he's away on a business trip, she leaves her child with her parents and invites a younger man into her home. Her husband's bed, the bathroom he uses, the kitchen where he eats—every corner of the house becomes a stage for her revenge. As passion consumes her in each of these spaces, Midori gradually finds her heart breaking free.