It has been 30 years since Dr. Sam Beckett stepped into the Quantum Leap accelerator and vanished. In present day, a new team led by physicist Ben Song has been assembled to restart the project to try and understand the mysteries behind the machine and the man who created it.

But everything changes when Ben makes an unauthorized leap into the past, leaving his team behind to figure out why he did it. At Ben's side throughout his leaps is Army vet Addison, who appears in the form of a hologram only Ben can see.