Seven Miles from Alcatraz

Champ Larkin and his cellmate Jimbo break out of 'The Rock' and make their way to a nearby offshore lighthouse station while avoiding the patrol boats. Forcing their way into the station, the escaped prisoners take captives as they plan the rest of their escape. But their scheme is complicated by a secret Nazi spy awaiting the arrival of German agents who are charged with an important mission: the destruction of San Francisco.