Ryland Grace (Ryan Gosling), a school-teacher-turned-astronaut, wakes up from a coma, alone, on a space station with no memory of who he is or his mission. His memory returns in bursts and he pieces together that he was sent to the Tau Ceti solar system, 12 light-years from Earth, to reverse the impact of a space event that had already hurled our planet into the early stages of an Ice Age. As details of the mission unravel, Grace must call on all of his scientific training and sheer ingenuity, but he might not have to do it alone...