阿凡無意間干擾了時光特警隊出任務，現在得和隊員莉姆一起回到過去，穿梭各個時空拯救無辜性命，也親眼見證歷史往前推進。

It's been nearly 30 years since Dr. Sam Beckett stepped into the Quantum Leap accelerator and vanished. Now, a new team, led by physicist Ben Song, has been assembled to restart the project in hope of understanding the mysteries behind the machine and the man who created it. Everything changes, however, when Ben makes an unauthorized leap into the past, leaving the team behind to solve the mystery of why he did it.