Norie Sakota, a married woman weary from loneliness during her husband's long overseas business trip, gives in to temptation when her subordinate Ogawa visits her home to deliver her husband's forgotten belongings. Afterward, when Ogawa suddenly rises in rank at work, Norie suspects he's using their affair to advance his career. She confides in her superior, Hirose, from the same faction, who decides he wants a piece of the action and arranges through another employee, Tanaka, to get involved himself.