Spencer Griffith (Joseph Mazzello) has problems. Bullied at school by Turbo (Joey Simmrin) and ignored by his workaholic father and short-tempered sister in the wake of his mother's death, Spencer badly needs a friend. He gets one when he finds a robotic cybosuit in his backyard. Naming the suit Cy, Spencer discovers that it was created by the peace-loving Trelkins and dispatched into space in the hope of eluding the evil Brood warriors, who are now on the suit's trail. Spencer uses Cy to gain his revenge on Turbo, before helping the suit against the pursuing Brood, who have now also arrived on Earth.