While under heavily armed guard, the dangerous convicts aboard a cargo ship unite in a coordinated escape attempt that soon escalates into a bloody, all-out riot. But as the fugitives continue their brutal campaign of terror, they soon discover that not even the most vicious among them is safe from the horror they unknowingly unleashed from the darkness below deck.
Jeong-won, who forgot the past and lives a peaceful marriage, receives a phone call from the police one day. The man who sexually assaulted her has been caught and the news shakes up the couple’s life and breaks down their daily lives.
Hyeon-gyu, who was injured and fell into an administrative soldier while learning the motion of "spinning gun" at the honor guard, wants to become a member of the honor guard again and run the event.
