Red Randall and Jimmy Joyce are en route to Calcutta to join the Twelfth Air Force when Japanese dive bombers swoop down out of the sky and send Transport 58 to the bottom of the Indian Ocean. Adrift on a life raft, the two Yanks cling to the hope that they will be rescued. They are...but by a Japanese submarine! In their dank little cell aboard the submarine they find another airman—an R.A.F. officer—more dead than alive.