The Chaser Joong-ho is an ex-cop turned pimp who is running in financial trouble as several of his girls have recently disappeared without clearing their debts. A pattern he noticed though is a peculiar caller, Young-min being the last customer serviced, and unwittingly he had sent one of his girls, Mi-kin to meet up with him for business. Smelling a rat, and thinking that the caller might be a human trafficker of sorts, he tries to spring a trap, but Murphy's Law kicks in, and hence begin the cat and mouse game.