Gully Foyle, unskilled space crewman, is the only survivor on his drifting, wrecked spaceship, and when another space vessel - the Vorga - ignores his distress flares and sails by, Gully becomes obsessed with revenge. He endures 170 days alone in deep space before finding refuge on the Sargasso Asteroid and returning to Earth to track down the crew and owners of the Vorga. But, as he works out his murderous grudge, Gully Foyle also uncovers a secret of momentous proportions ...