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.

After a man's sister is killed by two gunmen who seemingly come out of nowhere, he manages to find and kill them. He then discovers that the men he killed were part of a multi-millionaire's bizarre "death game", where someone is hunted through the streets of Los Angeles by teams of killers who get a big-money prize for killing their quarry--and he realizes that now he is "it".

A female CIA agent is assigned to train and lead an all-female squad to Colombia to stop a renegade agent who has hired himself out to a drug cartel.

Models all over town are ending up on the wrong side of a razor-sharp blade, and police are baffled by the surgical precision of the corpse mutilation. David, a local photographer who knew a couple of the murdered women, finds his world turn upside down as the streets run red with blood.