It's been 30 years since Dr. Sam Beckett (Scott Bakula) stepped into the Quantum Leap accelerator and vanished. Now a new team has been assembled to restart the project in the hopes of understanding the mysteries behind the machine and the man who created it. Everything changes, however, when Ben (Raymond Lee) makes an unauthorized leap into the past, leaving the team behind to solve the mystery of why he did it. At Ben's side throughout his leaps is Addison (Caitlin Bassett), who appears in the form of a hologram only Ben can see and hear. She's a decorated Army veteran who brings level-headed precision to her job.