A group of aliens from the planet Krankor plan to invade Earth. They are lead by their leader, Phantom however they are stopped in their tracks by a masked hero known as Prince of Space.

    The film is a combination of several shorts and films from the Japan called Planet Prince edited together to make US television film release.

    Japanese release directed by Eijirô Wakabayashi.

    The film was on the show Mystery Science Theater 3000, episode 816.