The Atlas II-a space craft designed to keep the supergiant star, Argus, from exploding-suddenly goes offline, diverting a nearby astronaut from a long, solitary mission. Once aboard the Atlas II, astronaut Cale soon discovers the crew violently murdered by an inhuman force. As the burning star swells closer to supernova, Cale finds himself in a race against time to save not only his own sanity, but billions of life forms.