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A structural security expert must escape from a prison that was built based on his own designs in order to track down the person who framed him in this gritty action thriller starring Sylvester Stallone and Arnold Schwarzenegger. B&C Security founder Ray Breslin (Stallone) wrote the book on structural security. His encyclopedic knowledge of the subject has transformed the prison industry, and he's been known to test his theories by allowing himself to be incarcerated just to examine his work from the inside. Along with his business partner Lester Clark (Vincent D'Onofrio), trusted associate Abigail Ross (Amy Ryan), and resourceful technology expert Hush (Curtis "50 Cent" Jackson), Breslin makes a good living escaping from the world's toughest prisons. When Breslin's team is approached by a CIA lawyer (Caitriona Balfe) with a proposal to test an off-the-grid penitentiary, the challenge (and the sizable paycheck) is impossible to resist. From the moment Breslin is picked up by a team of murderous private contractors, however, it's obvious something has gone horribly wrong. Later, when Breslin regains consciousness in The Tomb -- a highly fortified prison based on his own design -- it quickly becomes apparent he's been set up. Warden Hobbs (Jim Caviezel) runs The Tomb with ruthless efficiency, and his team of masked guards is quick to make an example of unruly inmates. At first it looks as if Breslin has finally been beaten at his own game, but then he meets Rottmayer (Schwarzenegger) -- a convict who's equally tough, and equally determined to regain his freedom. If Breslin and Rottmayer can just survive long enough to formulate a plan, they've got a fighting chance. But should they fail, they will both perish in a hell that was constructed as a place where people go to disappear forever.