The day before the attack on Pearl Harbor. The captain, Matthew Yelland, faces a massive moral dilemma: use their futuristic military dominance to destroy the Japanese fleet and save thousands of American lives, or refrain from interfering to avoid alters to the timeline and history. After deciding to launch an attack on the approaching forces, the time vortex suddenly reappears, forcing the ship and its crew back to the present day just before they can strike, leaving history intact.