During the Cold War, an object from space crashes in the ocean just off the coast of Maine and then enters the forest near the town of Rockwell.

The following night, nine-year-old Hogarth Hughes investigates and finds the object, a 50-foot-tall alien robot; he runs away but then returns to save the robot when he gets electrocuted while trying to eat the transmission lines of an electrical substation. Hogarth eventually befriends the Giant, finding him docile and curious. When he eats railroad