一個型警遇上疑犯的情人從初次邂逅到墜入愛河的過程，金南佶 飾演的探員鄭宰坤正追蹤一名殺人犯，得知他有位在三流酒吧當侍應的紅顏知己金惠景(全度妍飾)。宰坤為了抓犯人不擇手段，當臥底潛入酒吧工作，密切留意惠景的舉動。但越共處得 久，他越有罪疚感，甚至質疑當初的決定。他對這惠景漸漸產生微妙的感覺。原本一直渴望情人歸來的惠景，與常常在身邊的宰坤漸漸走近，全度妍與金南佶完美演出這對謊言的情人。編劇起家的吳勝旭，為人熟悉始於為九十末編寫的韓流電影劇本《生死邊緣》、《八月照相館》，2000年首次執導《雙生警賊》(Kilimanjaro)，15年後再次執導，《因恥愛你》把愛情、 浪漫、警匪元素共冶一爐，而且得心應手。

To catch a murderer, detective Jung Jae-gon (Kim Nam-gil) gets close to the murderer’s girlfriend, a bar madam Kim Hye-kyung (Jeon Do-yeon), to use her as bait. But Jae-gon’s unethical plan goes sour when he falls in love with Hye-kyung. Director Oh Seung- uk’s first film in 15 years has all the makings of a hard-boiled film noir, but this stylish and offbeat romantic drama boasts an irresistibly attractive femme fatale who’s more than just another sexy seductress. Playing one of the most morally and emotionally complex characters of her career, Jeon Do-yeon is simply captivating as an icy woman who is starting to feel disillusioned about her fleeing lover.