1. Ray Breslin is a security expert who tests maximum security prisons to find weaknesses by intentionally escaping. He takes a job to test a secret CIA prison called "The Tomb" but is captured.
2. Breslin discovers the prison is on a cargo ship at sea. He works with a fellow inmate to study the prison and plan an escape.
3. Breslin causes a distraction and convinces the doctor to help them escape. They overtake the guards during a riot and make their way to the deck.
4. Breslin's colleagues grow suspicious of his business partner who betrayed him. Breslin and the other inmate ultimately escape by helicopter to Morocco.