武内小夜子（木村佳乃饰）是个以“后妻”为业的女人，她与婚介所老板柏木（高桥克典饰）搭档，以继承富有老人的遗产为目标，连续实施结婚诈骗。而为了阻止他二人夺走自己父亲的全部遗产，中濑朋美（木村多江饰）请来侦探本多（伊原刚志饰）调查小夜子。围绕着巨额遗产，双方展开了激烈的交锋

In Osaka, Sayoko Takeuchi indulges in her evil ways. She targets old wealthy men and marries them for future inheritances. She works with Toru Kashiwagi who runs a marriage agency. Sayoko Takeuchi is married to a wealthy elderly man. One day, Tomomi Nakase hears her father was taken to the hospital. She rushes to the hospital and learns her father is unconscious. She also hears for the first time that her father is married to Sayoko Takeuchi. Tomomi Nakase takes the first steps in stopping Sayoko Takeuchi from gaining her father's fortune. She hires private detective Yoshinori Honda to investigate Sayoko Takeuchi and Toru Kashiwagi.

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