While her husband is away on a business trip, Rei Aoki is suddenly visited by her brother-in-law Makoto. Sensing something off about his unusual behavior, she grows uneasy. Makoto awkwardly confesses, "I need money..."—he's accumulated a 5 million yen debt with a high-interest lender. Concerned, Rei decides to visit the lender herself, but ends up being forced to work at the man's bar in Makoto's place. The bar is a brothel where lewd acts are sold, and Rei finds herself trapped, helplessly molested by customers. Unaware that everything has been orchestrated, she gradually loses herself, one devastating step at a time. The story unfolds with each moment cutting deep into her psyche.