If you could, would you return to your youth and fix the biggest mistake of your life? Forty-six-year-old Gus Harrison would. In fact, he would do anything for that chance.
Gus lives his life in the past. Not only does he consider his time at Milneburg State University the best years of his life, he obsesses over the loss of his true love, Penny Neal, who was murdered one day after they broke up, and later, the death of his best friend, Dub Druber.
But Gus has problems of his own in the present. His fixation on the past caused him to grow apart from his wife, Marie, and he is forced to resign from his job. On the worst day of his life, Gus gets mugged after leaving work and ends up at the Milneburg Fair. There he encounters Old Petey, who presents him the opportunity of a lifetime, a chance to go back to his youth and make things right.
With this second chance, Gus must now go on the most important mission of his life. He must change history and save the ones he loves.