Master Cain is an intergalactic bounty hunter who is regularly employed by the king of Arriden to find his runaway son. To assist him in his search, Cain buys Star, a man-dog. Man-dogs are bred over generations for their strength and loyalty. But Star turns out to be a eunuch from Earth with fantasies of being a man-dog. Once Star is in his possession, Cain decides he might as well try him out.Together they capture the prince and return him to the capital city. However, they found him in the desert in the camp of the Plainsmen's army, which is heading toward the capital to kidnap the king and take over the city. With Star's help, can Cain protect the king and fight off the Plainsmen? Will Star's loyalty to Cain and his increasing love for his new master be rewarded?