连环杀人案中失去妹妹的警察泰秀（金相庆 饰）在雨夜潜伏侦查一起肇事逃逸案的过程中，意外抓获了犯案多起的连环杀人嫌疑犯姜川（朴圣雄 饰），而悲剧也由此开始。泰秀意外得知姜川正是杀害自己妹妹的凶手，为了找到妹妹的尸首，泰秀竟跪了下来...而在指认现场的时候，另一个痛失爱妻的男人盛贤（金成钧 饰）悲愤现身......Tae-soo has been a lazy policeman, but accidentally he runs into Kang-cheon, whose car is covered with blood. Tae-soo suspects the worker to be the serial killer that kills young women for months. But as they can't find hard evidence, Kang-cheon is allowed to go. Short time later Tae-soo's sister is found raped and murdered and the detective knows who's the one to blame. But as he can't arrest Kang-cheon, he is searching for vengeance aside any legal term. On his own private investigations, he meets Seung-hyeon who lost his wife to the killer. Together they wanna see Kang-cheon suffering and dying for his murders.