Truck driver Jack Burton gets embroiled in a supernatural battle when his best friend Wang Chi's green-eyed fiancée is kidnapped by henchmen of the sorcerer Lo Pan, who must marry a girl with green eyes in order to return to the human realm.
Hoping to alter the events of the past, a 19th century inventor instead travels 800,000 years into the future, where he finds mankind divided into two warring races.
