Ryan Crane wasn't looking for trouble--just a cup of coffee. But when he spots a gunman emerging from an unmarked van, he leaps into action and unknowingly saves John Ward, a billionaire with presidential aspirations, from an assassination attempt.

As thanks for Ryan's quick thinking, Ward rewards him with the chance of a lifetime: to join a group of lucky civilians accompanying three professional astronauts on the first manned mission to Saturn's moon Titan.

A devoted family man, Ryan is reluctant to leave on this two-year expedition, but with the encouragement of his loving wife--and an exorbitant paycheck guaranteeing lifetime care for their disabled son--he crews up.

Little could Ryan know that this mystifying journey would forever change his life and the lives of his crewmates. Just when their space adventure seemingly ends, it shockingly begins.