In the year 2169, time travel has become a reality. Professor Paxton Gardner, after being told he can only use his device for passive data gathering, strives to make a lifelong dream come true, by stealing his invention in order to prevent one of the greatest disasters in history. As Doctor James Stone, a former student and close friend of Paxton's, is preparing to make a dream of his own come true by living and working on Mars, he is requested to assist in ascertaining where Gardner has gone, and how to bring him back. The journey of each man culminates in ways that neither could ever foresee.