Buck journeys through a space warp into another universe, where he discovers that the peaceful planet Pendar is being threatened by the sinister war witch Zarina. The Pendarans enlist the aid of Buck and Princess Ardala, who had followed Buck through the space warp, and an unsteady alliance between the humans and Draconians is formed as Buck leads a combined fleet against Zarina's battlecruiser.

Buck journeys through a space warp into another universe, where he discovers that the peaceful planet Pendar is being threatened by the sinister war witch Zarina. The Pendarans enlist the aid of Buck and Princess Ardala, who had followed Buck through the space warp, and an unsteady alliance between the humans and Draconians is formed as Buck leads a combined fleet against Zarina's battlecruiser.

Buck, Wilma, and Twiki set off into deep space aboard the Searcher, a starship on a mission to find the lost tribes of Earth -- humans who fled to the stars after a nuclear holocaust that all but destroyed the planet. The Searcher encounters a severely-damaged spacecraft with one survivor, who tells them of a savage attack by a bird-man named Hawk. Searcher sets course for the planet where it is believed Hawk lives, and Buck soon becomes involved in a desperate battle of wits and piloting skills with Hawk. Hawk's mate, who was a passenger in Hawk's ship, is mortally wounded in the battle and Buck and Hawk form a shaky alliance to seek medical aid for her. Eventually, Hawk joins the crew of the Searcher, looking for others of his kind.