An ex-policeman-turned-street-smart pimp attempts to capture the elusive serial killer who has been preying on his girls in this stylish South Koran thriller from first-time feature filmmaker Na Hong-jin. Jung-ho is a former cop who now operates on the other side of the law. When his girls start disappearing without clearing their debts, Jung-ho rightly begins to suspect foul play. Shortly thereafter, Jung-ho receives a call for a girl and dispatches Mi-jin -- recognizing all too late that his latest customer's telephone number exactly matches that of the man who hired the last prostitute that went missing. His detective's instincts now kicking into full gear, Jung-ho races desperately through the streets in search of Mi-jin. After denting a car in a dark ally, the eagle-eyed pimp notices that the driver of the car he collided with is wearing a blood-spattered shirt. Jung-ho gives chase, eventually catching the man and discovering that his name is Young-min. Later, at the police station, Young-min admits that he is indeed the killer that police have been searching for, and that Mi-jin is quite possibly still alive. Though the police aren't convinced that there is any hope for Mi-jin, given the number of corpses popping up around town as of late, Jung-ho believes that Young-min is telling the truth. The law states that the police can only hold the suspected serial killer for 12 hours, but is that enough time for Jung-ho to rescue Mi-jin and prove Young-min's guilt?