WWII glory film provides comic relief in the form of romance. Second-in-command Power falls hopelessly in love with school teacher Baxter, only to find out later that she is Lt. Commander Andrews' fiance. Once this little tidbit of information is disclosed, the two officers embark on a mission to destroy a Nazi U-Boat responsible for laying mines in the North Atlantic. Fantastic special effects and sound. Based on the story by W.R. Burnett.