A pair of hard-boiled Tokyo cops are investigating a gruesome murder: after killing the victim, the murderer cut his skull open and cooked his brain in a stew. As they try to track down the killer, they discover that, quite literally, everybody is a suspect. Will they bring the terror to an end, or will they become part of it themselves?

In a small Tokyo apartment, twelve-year-old Akira must care for his younger siblings after their mother leaves them and shows no sign of returning.

After an alien invasion threatens to annihilate the human race, a young Japanese girl, named Milly (Anne Suzuki), travels back in time from 2084 to October 2002, and enlists the reluctant aid of skilled Tokyo gunman, named Miyamoto (Takeshi Kaneshiro), to discover and prevent the start of the war. However, trouble ensues when the two protagonists are forced to deal with a Japanese mafia boss, named Mizoguchi (Goro Kishitani), who is somehow involved in the start of the war by keeping the first alien spaceship and its alien pilot captive, while our two heroes race against the clock to find a way to stop the oncoming destruction from the vengeance-seeking alien invasion fleet on its way to Earth.