During routine manoeuvres near Hawaii in 1980, the aircraft-carrier USS Nimitz is caught in a strange vortex-like storm, throwing the ship back in time to 1941—mere hours before the Japanese attack on Pearl Harbor.
Characters are shown confined to the medical ward on a ship, but they are not seriously injured and not connected to any life support or monitoring equipment. A syringe for injecting medication is shown but not used.
Aircraft shoot at each other in one scene. One character holds a gun to another character's head as a hostage and threatens to kill her, the character shoots at intervening soldiers and later gets shot by the soldiers and dies. Characters are also strafed by aircraft, two die.