A movie director is approached by his old math teacher with a great movie idea: the Devil declares that the Earth is hell. The director rejects the idea, but subsequent events in the life of a writer, a friend of the director's, and a young prostitute he loves seem to prove the math teacher's idea.
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Prison, also known as The Devil's Wanton in the United States, is a 1949 Swedish drama film directed by Ingmar Bergman. It is the earliest film directed by Bergman to be based on his own original screenplay.