An unmanned spaceship returns to Earth carrying samples from Proxima B in the Alpha Centauri system. As scientists study the specimens they discover the alien elements are alive! Soon, the scientists must fight back as the small creatures replicate at an exponential rate, increase in size, turn violent and attempt to take over Earth.

In an underground fight club, blackbelt Travis Brickley is killed after losing to the evil martial arts master Brakus. Travis' death is witnessed by Walter Grady, the son of his best friend Alex Grady. Alex and his partner, Tommy Lee, vow to avenge their friend's death by defeating Brakus and shutting down the fight club.