At this moment, Dantro, the Planet Man and the crew of the Earth's first space expedition, who Dantro saved from certain death, are swiftly speeding towards Planeria X, after just getting out of the reach of some unidentified bogey space ships. Dantro's ship, the Planeteer, is the most breathtaking engineering feat the Earth people have ever seen. It's as large as a fortress, and an endless system of instruments and mechanisms in a control chamber giving the appearance of a fantastic flying laboratory.