Vada Sultenfuss has a holiday coming up, and an assignment: to do and essay on someone she admires and has never met. She decides she wants to do an assignment on her mother, but quickly realises she knows very little about her. She manages to get her father to agree to let her go to LA to stay with her Uncle Phil and do some research on her mother.

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.