After 1988 Seoul Olympic, Ji Kang-heon, who is sentenced for 7 years, and other inmates escape from the police van. After escaping, Ji Kang-heon and inmates make the entire Seoul under fear while they hold hostages.

Officers Cho Kyung-yoon and Park Eun-joo are on the hunt a killer following duo of ghastly murders. The victims carry a common military past, and the secret of their past must be unraveled to find the killer.