Synopsis: From the Back Cover of the Signet first edition: A world's death cry! The space-distress call had sent Aaron Denton racing to his home planet of St. Paul. Yet long before he reached that sector of space, his world had died. Some had escaped the cataclysm that destroyed so many innocent lives. Some were the ruthless killers who had cold-bloodedly slain helpless women and children to insure their own places aboard the few spaceworthy ships left on St. Paul. Now Aaron had no qualms about using any means - inside the law or out - to track down and claim vengeance on their leader, the man who had give the order to fire and then abandoned St. Paul and its people to a terrifying doom.