Sau khi vô tình can thiệp vào một vụ án của Đội Tuần tra Thời gian, Bon phải cùng đặc vụ Ream cứu những sinh mạng vô tội trong quá khứ – đồng thời chứng kiến lịch sử diễn ra.
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.