Her husband is a section chief at a construction company, and they live an ordinary life as a childless couple. One day, he accidentally witnesses his wife, Etsuko, in the act of cheating. Overwhelmed by shock and jealousy, he suddenly becomes aware of a deep, hidden excitement within himself. Unable to forgive her infidelity, he makes her a harsh proposal as punishment: she must be taken by another man—specifically, one of his own subordinates. The subordinate is an unmarried man in his forties with a loose, careless attitude toward women. Thus begins the husband's revenge—watching his wife be taken by his underling.