Star Boy returns to his home planet and his stay brings many strange surprises!

The Legion of Super-Heroes are asked to come to Xanthu and help them fix a damaged orbit beacon. The Legionnaires in attendance include Star Boy, a native of Xanthu, Phantom Girl, Invisible Kid, Timber Wolf and Chameleon Boy. After they succeed, the leader of Xanthu wants to thank the Legionnaires personally and to ask for their assistance in looking for Atmos, Xanthu's only superhero. They find out that he left the planet under an assumed name. The leader of Xanthu then asks Star Boy to remain behind to be Xanthu's champion and to quit the Legion. Surprisingly, he agrees.