Capt. Bart Manson (Edward G. Robinson) is the Captain (naval) of an oil tanker during World War II, who rescues Katherine Hall (Lynn Bari) when her ship is sunk by a German U-boat. The couple marry, but Manson's ship is subsequently sunk as well. Hall becomes a prime suspect for involvement as she was carrying no identification when rescued. However Manson later discovers that his Chief Mate Fred Adamson (Victor McLaglen) is in fact a German Espionage responsible for the sinking, and Hall is cleared of any culpability.<ref name="imdb-ps"></ref>