It is five years after NASA found liquid water on the surface of Mars. The Martian atmosphere has changed. All contact has been lost with the planet. On Earth, entrepreneur Michael Macmillan is preparing the first manned mission to the Red Planet, with a seat reserved for an ordinary person willing to do something extraordinary. When Faye Banks secretly enters the Seat 25 competition, she never expects to win. But when the one-way trip becomes a reality, her life on Earth is turned upside down. With time running out, Faye must decide if to leave her husband, family and friends.