Heaven Knows, Mr. Allison (1957)

They were alone on this Pacific Island... trapped behind enemy lines... the marine who had been thru Hell and Sister Angela with her supreme faith in God.

A Roman Catholic nun and a hard-bitten US Marine are stranded together on a Japanese-occupied island in the South Pacific during World War II. Under constant threat of discovery by a ruthless enemy, they hide in a cave and forage for food together. Their forced companionship and the struggle for survival forge a powerful emotional bond between them.