Harumi Morishita (Eiko Koike) lives with her husband Kyohei Amaya, but they have not officially registered their marriage. One day, she receives a phone call from that police that her husband has died. She goes to the hospital where her husband Kyohei Amaya was sent to. There, Harumi Morishita meets Kanako Ogura (Ryo) and Akane Fujimiya (Rei Okamoto), who both insist that Kyohei Amaya is their husband. Both Kanako Ogura and Akane Fujimiya have not registered their marriage like Harumi Morishita. A will was left behind by Kyohei Amaya. His will leads Harumi Morishita, Kanako Ogura and Akane Fujimiya to a single mother share house and states that he will leave 300 million yen to the only wife that he loved.
Segawa Kiichi, a former delinquent, happens to encounter a lonely 10-year-old girl who looks like she is going to be killed by the Yakuza. He saves her by reflex and later realizes that she lost her memory. She doesn't know why the Yakuza are after her and Kiichi is attacked time and again because of that. With his own life in sudden danger, he calls on six friends from his high school days as a delinquent. These enthusiastic, single-minded men band together to protect her to the end.
With his looks, personality and capabilities, 35-years-old Haruno Yoichi is considered the "ideal husband". However, he feels that his wife's attitude has cooled ever since she gave birth to their child. He knows neither the cause nor the solution, and has been reduced to the "unfortunate husband" at home. 28-years-old Chisato was thought to be the "ideal wife with all the the traditional graces" who does her best to look to her best to look to her husband with respect. But her husband's words and deeds which she could excuse until after childbirth, now make her feel uneasy. Because of her continued hysterics, she has become the "monster wife" to her husband.
A rookie detective assigned to the Ginza Police Station finds himself partnered with his estranged father. Together with the rest of the team, they solve crimes as an old adversary plots to take revenge on father and son.
