Haunted by the screams of the men he murdered, ex-Marine medic Riff Khora is serving a life sentence on board a prison ship. Seeking more punishment for his crime, he strikes a deal with the corrupt Captain Vidal-an exchange of pleasure and pain-and forges a new life leading the team that surveys space wreckage for salvage. Ship engineer Zed Jakobsen's psychometric abilities make prison a sentence worse than death, and the barrage of emotional stimuli is an unending torment. His only regret is that he didn't kill the monster who sent him to prison, and only a glimmer of hope to escape a judgment he doesn't deserve keeps him clinging to a brutal existence. When they board derelict ship Pandora and discover a lone survivor, the hell of prison life plunges into abject horror. An epidemic of violence and insanity consumes their ship, driving the crew to murder and destruction. Mutual need draws Riff and Zed together, and their bond gives them the strength to fight a reality they cannot trust. But Vidal possesses the only means of escape from the nightmare, and he's not letting anyone leave alive.