Unconvincing script and poor special effects sink this submarine film from the start. Quickly made, it is based on the Japanese attack on Pearl Harbor. It relates fictional events that occurred before the attack, particularly a story line involving Chapman who ends up on a submarine after
the pleasure boat she was on has been sunk. The sub tries to warn the U.S. base about the upcoming attack, but to no avail. The scenes involving the submarine and plane battle are excellent, but the rest of the battle scenes are strictly mediocre.