一橋桐子（松坂慶子）は、更なる犯罪として「結婚詐欺」を選択。女性のためのセミナー＝結婚詐欺講座の受講を機に、シニア婚活パーティーへと向かう。そのセミナー講師は、憧れの三笠（草刈正雄）からお金を搾り取った、小池ゆかり（木村多江）だった。恋愛から遠ざかっていた桐子は苦戦するものの、思いがけず素敵な男性（長谷川初範）とのデートに成功。順調に進むも新たな悩みが…それは「刑務所か、結婚か」だった！
Kiriko hones in on marriage fraud as her next crime. She attends a seminar for women on the fraudulent art of drawing money from men, and learns that the seminar is run by Koike Yukari, who had conned money out of Kiriko's acquaintance Mikasa Takashi. Kiriko goes to try her luck at match-finding events for senior-aged men and women, and though her long hiatus from dating inhibits her, she unexpectedly forms rapport with a seemingly ideal man. But as she heads to her first date with him, she deliberates between prison life and married life.
