Chihiro, a married woman who bought a small apartment in Tokyo with a loan and lives with her husband. One day, a man named Kita, who claims to be the manager of a jewelry store, visits and recommends a custom-made ring. Chihiro, who couldn't even go to her honeymoon, was fascinated by the ring and said, "I'll give it to you until the end of the week, so please consider it." That night, by coincidence, her husband was going to gift her a late wedding ring with her pocket money. She tries to turn down Kita's offer, but Kita reappears, setting an unexpected trap for Chihiro...
