Tsutomu Yoshioka, a Tokyo office worker, is engaged to Mariko, the niece of his company's president. But Yoshioka has a crisis of consence when he remembers his former love Mitsu, a rural girl whom he met and later left while in college. Shimako, a former friend, persuades Yoshioka to meet with Mitsu while she plots to blackmail Yoshioka by photographing the meeting to break up Mariko and Yoshioka.