Rui is a good wife living a happy life with her husband Koji, who works at a major bank. One day, Kudo, the president of a construction company, comes to Koji to negotiate for a loan. Naturally, Koji turns him down, but Kudo becomes enraged and attacks Rui, gang-raping her. The couple's hell continues as they film the encounter and Koji uses the footage to blackmail them... Before long, Rui becomes a masochistic slave who craves cock herself...