When Andrew literally bumps into a tiny spaceship while walking his dog, his life changes dramatically. Suddenly, he is in telepathic communication with Ysdran, an alien who trains him in the use of special powers of teleportation and mind control. His initial delight with his new abilities and with his new friend are only slightly tempered by the negative reactions of his parents and friends. But when he comes to realize that Ysdran is planning to claim Earth as a colony for her people so they can mine its oxygen and hydrogen resources, he is terrified. Somehow he must stop her before his planet is lost.