Mako is a married woman living with her husband in a small apartment in Tokyo. One day, her ex-boyfriend, Hito, comes to visit her. He introduces himself as the manager of a small advertising agency and invites her to a trip to Europe, saying it's "almost free." That night, Mako consults with her husband. However, her husband has also been planning a trip as a belated honeymoon. Moved by the proposal, he declines Hito's offer, but Hito says, "We've already incurred a large penalty fee," and as payment, he and his friends pin Mako down...