Ronald Colman is "Michel", a debonair thief who ends up in prison on Devil's Island. Sandwiched between the shark-infested waters on one side and the bug-infested forest on then other, he is condemned to live out his days under the brutal custodianship of "Digges" (Jean Vidal), the prison warden. When he befriends Ann Harding, the put-upon wife of his nemesis, they begin to work on a daring plan tver mais...