Eom Joong-ho is a former police officer turned pimp, and several of his girls have gone missing. One night he gets a call from a customer and sends Min-ji, one of his few remaining girls. Later he realises that the same customer was the last to see the missing girls, and believing that Min-ji might be in danger, goes to look for her. While searching for her he dents another car in an alley, and when he sees blood splattered on the unharmed driver's shirt, he senses that the man, Je Yeong-min, is the suspect. Yeong-min tries to run away, but Joong-ho catches him, and both men are taken to the police station. At the police station, Yeong-min confesses to the murder of the women, and says that his last victim, Min-ji, may still be alive. But despite his confession, the police have no evidence to imprison him, and cannot detain him for more than twelve hours. As the police search for the bodies of his victims, Joong-ho is the only one who believes that Min-ji is still alive, and must find her before the killer is released.