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.
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.
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.