In the upscale residential S district of Kanagawa Prefecture, located along the coast, lives housewife Chisato. She shares a secret affair with her neighbor, Taki, a bond they've carefully built. One day, her life takes a drastic turn when she receives a photo from Wada Tetsuo, a man known around town as a pervert. Chisato and Taki had planned a romantic getaway, but Wada's blackmail forces an abrupt change in their plans. A new, twisted triangle forms between them, and Wada's relentless exposure training begins to dominate their trip. An explosive mix of infidelity, blackmail, and psychological domination unfolds.