After a long overseas assignment, the relationship between a subordinate and his boss takes a strange turn. The catalyst is an unexpected affair sparked between the subordinate's wife, Maki Hojo, and the boss's wife, Tsubaki Kato, entangled with events from their past. As both couples decide on new homes, the boss makes a bold proposition to the subordinate—one final chance. He offers his own wife in exchange, proposing a disturbing deal: "Let me have your wife, and I'll let you have mine."