影片改编自上世纪40年代美国一个真实的故事。 费尔南德兹(杰瑞德·莱托 Jared Leto饰)是一个职业骗子,他用惯常的手段,通过“寂寞芳心交友俱乐部”结识了护士贝克(萨尔玛·海耶克 Salma Hayek饰),企图骗取她的钱财。然而贝克是个领着救济金的穷人,发现无利可图的费尔南德兹决定和贝克结束关系。怎料,贝克已经深深爱上这个骗子,她甚至愿意留在他身边,和他一起行骗度日。 费尔南德兹用擅长的招数,骗取各式女子欢心,和她们之间真真假假的过招令贝克的妒嫉心和占有欲无限膨胀。她时常怀着复杂的心理把受骗女子杀掉,死于他们手下的无辜者就达10多个——其中包括一个已经生下费尔南德兹孩子的女人。这对喋血鸳鸯,引来了警方的紧急追查, 恢恢法网就在眼前……In the late 1940's, Martha Beck and Raymond Fernandez were America's notorious "Lonely Hearts Killers". Their lethal scam was simple; they would swindle and then viciously murder lovelorn war widows who would answer their personal ads in which Ray would describe himself as a sexy Latin Lover. Ironically, Ray's initial introduction to Martha was as a prospective mark. But when they met, it was love at first sight, perhaps as a result of their penchant for kinky sex and their mutual love for duplicity and easy money. With Martha posing as Ray's sister, they bilked elderly spinsters and widows of their savings and then viciously murdered them in a bloodbath of sexual frenzy. When they were arrested, Martha and Ray confessed to 12 killings, although it is believed the actual number is closer to 20. At their sensational trial, Martha and Ray cooed, held hands and seemed as though they could not get enough of each other. Their plea of not guilty by reason of insanity was rejected, and on August 22, 1949, the homicidal lovers were sentenced to death. After numerous appeals, they were electrocuted on March 8, 1951, side-by-side in Sing Sing prison.