When A.I. goes bad Astronauts Karl Leven and Mark Taylor return to Earth from deep space after five years of suspended animation. While both men undergo a series of psychological debriefs, it becomes apparent their interpretation of what occurred during the mission is at odds with the official report of events. As both men begin to adjust to their lives with differing degrees of success, they realise that ANNE –a highly advanced on-board Artificial Intelligence – has gone rogue, altering the parameters, and extending their mission beyond the original remit. Coupled with the appearance of a bright light that appeared during their spacewalk to fix the heat shield before their re-entry to Earth, these incidents begin to impact on Karl and Mark with devasting consequences. Why did the A.I. extend their flight? What was the mysterious light and what does the space centre know about their mission that causes both astronauts to question their true purpose in life?