一天夜里，一名男子在东京郊区被车撞死。死者的妻子法子是一个爱出风头生活奢华的女人，暗地里还有一个情人。警方通过调查发现，死者的死因很可疑，而法子是三亿意外死亡保险金的受益人，存在着充分的杀人动机。然而，法子却拥有完美的不在场证明。案情陷入了僵局……

A man’s body is found in the suburbs of Tokyo. The dead man was hit by a car and his head beaten by the reckless driver after the accident. The dead man had a wife named Noriko. She likes fancy things and she has a lover named Tsukada. It's also learned that the dead man was insured for 300 million yen. The media and the public look at Noriko and her boyfriend Tsukada with suspicion, but they have perfect alibis. Then, Detective Hibiki, who is in charge of the case, and Private Detective Kono become involved in a series of mysterious murder cases.

東京近郊でひき逃げ事件が発生。死体には頭部を殴打されたあとがあり、被害者に3億円の保険金をかけていた妻、法子と愛人の塚田に殺人容疑がかけられる。しかし完璧なアリバイがある2人に、刑事の響も探偵の河野も翻弄され…。