Jake is a human mercenary looking for a quiet place to rest, when his Protect Dar-dolf attacks the last living Henu, Arr. Feeling responsible, Jake stays on to care for Arr, as the alien with deep blue cat eyes and unusual abilities recovers.
Jake takes on the role of teacher, mentor, father, and lost brother for his new alien friend. He and Arr share adventures dealing with the Hydra, a race of lizard-like creatures who kidnap members of other species to sell on the black market as slaves; battle the Narnon on Gligula where Tuldavian Swamp Lizards lay their traps just below the surface of the slime; and engage in numerous other missions while learning to appreciate each others rare abilities.
Ultimately, they must face their toughest foe, the Helavites, a species which has been preying on the weaker beings in the universe for generations. In the underground catacombs of these beetle-like creatures a mystery is solved and the foundation for the resurrection of an old world are laid.