Subway in the Sky (1959)

A military doctor in Berlin is falsely accused of illegal dealing in drugs. Determined to prove his innocence, he escapes from the MPs and holes up in the apartment rented by his wife. He doesn't know that she has sublet the flat to a nightclub singer. When he finds out, he begs the singer to assist him. She likes him and agrees. The doctor thinks that his wife is behind the illegal dealings.