February 25, 1958: As a horse-playing, traveling brush salesman, Sam finds himself with two wives and two families. Although Ziggy predicts that Sam's mission is to choose between the two lives, the choice is made more difficult by the fact that there's only a 50/50 chance that he'll choose the right one. As if things weren't bad enough, Sam finds that his penniless host owes a pair of bookies some big bucks.
Theorizing that one could time travel within his own lifetime, Dr. Sam Beckett stepped into the Quantum Leap accelerator and vanished... He woke to find himself trapped in the past, facing mirror images that were not his own and driven by an unknown force to change history for the better. His only guide on this journey is Al, an observer from his own time, who appears in the form of a hologram that only Sam can see and hear. And so Dr. Beckett finds himself leaping from life to life, striving to put right what once went wrong and hoping each time that his next leap will be the leap home.