In a desperate, last-ditch effort, Ryland Grace is the last survivor; if he fails, humanity and the world itself will perish. Except that he isn't aware of that at the moment. Even his own name escapes him, let alone the details of his task or how to carry it out. He only is aware that he has been dozing off for a very, very long time. He just woke up to discover that he was millions of kilometres from his home and that his only companions were two dead bodies. Ryland discovers his crewmates are dead and that he is now faced with an impossible mission as his memories begin to blur. He must solve an unfathomable scientific enigma while travelling through space on this tiny ship in order to defeat a threat to our species' annihilation.