In the near future, a series of mysterious power surges strike the Solar System, endangering all human life. Astronaut Major Roy McBride, is selected by U.S. Space Command (SpaceCom) to investigate their source near Neptune. The surges are linked to the "Lima Project", a failed experiment from 26 years earlier, that was intended to search for intelligent life outside of our solar system. The ship’s antimatter drive is potentially malfunctioning and responsible for the energy surges. Roy’s investigation is further complicated by the fact his Father H. Clifford McBride (Tommy Lee Jones),  led the "Lima Project" and has not been heard from for 16 years after reaching Neptune. Having been told that Clifford may still be alive, Roy is joined by his father's old associate Colonel Pruitt (Donald Sutherland) whose loyalties remain ambiguous. Roy, who is noted for remaining calm under pressure, shows little emotional reaction to the news about his Father. As he and Pruitt travel covertly from Earth, to the moon and then onto Mars, it becomes clear that there is more to the mission than meets the eye. Will Roy remain emotionally detached or will old wounds impair his judgement?