Dr. Elefun’s Institute of Science has achieved the impossible: it has actually built an all-robot spaceship: an unmanned “phantom ship” composed entirely of robot parts, each with its own electronic brain unit. Upon a command from Astro Boy, the greatest robot ever built, the individual parts of the ship assemble themselves into a space craft capable of undertaking journeys to the corners of the universe journeys lasting several hundred light years! Who wouldn’t want such a ship for his country! Captain Olga, ruler of a tiny Pacific Island, tries to force Astro Boy into building her a phantom ship. Her purpose, though, is not to use the ship as an instrument of scientific study, but as a weapon for power. When Astro Boy eludes her agents, Captain Olga has her chief scientist, one Professor Schlepkin, build an imitation Astro Boy. This ersatz Astro Boy is similar enough to the original to be downright dangerous – so dangerous, in fact, that the two Astro Boys find it necessary to battle each other. Astro Boy vs. his double! Sure, the real Astro Boy wins, but not before the fake and his creators pull some unexpected and formidable surprises!