Noriko Yamada is a housewife and mother of five children, she and her husband go through an economic crisis that leads them to have problems with the bank. But while looking for work, he is making friends with Hitoshi Hibino; President of "K & D Research" a detective agency. This will give you the opportunity to pass a probationary period investigating an infidelity. And so Noriko will be a part-time detective. (filmaffinity)