A young couple's peaceful life in a suburban house takes a dark turn. The husband spends his days commuting to the city for work, leaving his wife, Shoko, alone at home. One day, while returning from shopping, Shoko has a chance encounter with Go, the man next door, who comes to her aid. Grateful, she invites him in for tea, and a sense of familiarity grows between them. However, that night, Go invades her home and violently rapes her. From that moment on, her life spirals out of control. Seizing every opportunity when her husband is away, Go repeatedly forces himself on Shoko. Their marriage begins to crumble under the weight of betrayal and trauma, as the sinister presence lurking next door slowly devours the warmth of their once-happy home.