Yong-Goo, who is mentally handicapped, is accused of kidnap and murder. The father of the dead girl is also the chief of the National Police Agency. Yong-Goo is given the death penalty and incarcerated. In prison, Yong-Goo shares a jail cell with five other inmates. One day, Yong-Goo saves the life of his cellmate So Yang-Ho (Oh Dal-Su) from a rival prison gang leader. Yang-Ho then offers to help Yong-Goo in any way he can to return the favor. Yong-Goo tells So Yang-Ho that he wants to see his daughter, Ye-Seung. The five inmates then plan to make a miracle happen.