After an alien invasion threatens to annihilate the people, a young Japanese girl, called Milly (Anne Suzuki), journeys in time from 2084 to October 2002, also enlists the reluctant aid of proficient Tokyo gunman, called Miyamoto (Takeshi Kaneshiro), to discover and block the start of the war. However, trouble ensues when the two protagonists are forced to deal with a Japanese mafia manager, called Mizoguchi (Goro Kishitani), who's somehow involved in the start of the war by keeping the first alien spaceship and its own alien pilot captive, while our two heroes race against the clock to find a way to block the oncoming destruction from the vengeance-seeking mysterious invasion fleet on its way to Earth.