When Koryu's childhood friend Shurei is abducted by gangsters, the desperate young woman recruits a female martial artist and a tough-as-nails stranger to join her for a dangerous rescue mission.
A Japanese bullet train is threatened with a bomb that will explode automatically if the train slows below 80 km/h, unless a ransom is paid. Police race to find the bombers so the train crew can learn how to defuse the bomb.
Attracted by the report of the development of a new type of rocket fuel, the vicious dictator of Krangkor, the dark planet, descends on Earth to steal the formula from its creator, the benevolent Dr. Makin.