An alien invasion force has attacked Earth and kidnapped Kevin and his sister! After refusing to become a spy for them, Kevin is blown out of the alien spaceship. But a telepathic robot rescues him, and together they decide to take on the aliens single-handed. Kevin must learn how to use space-age weaponry and a special robotic suit on his mission to infiltrate the alien headquarters. Only there does he stand a chance of stopping the invasion and bringing his sister home alive!