Major and Carver are assigned an investigation into reports of a dangerous new drug used in an underground MMA fight ring.

Taken off the Chelsea Bridge case, Major and Carver are assigned an investigation into reports of a dangerous new drug used in an underground MMA fight ring. Meanwhile, the original police officer who worked the Chelsea Bridge case 20 years ago returns to act as an advisor, and he just so happens to the old school, no nonsense copper Clifford Major - John's dad.

It's an awkward reunion. The two haven't been close for a long time and the last time Major Sr. saw his son was at John's funeral. Believing that John faked his own death for an undercover case, he is completely unaware that his son is now an AI driven cyborg.
Never having earned his dad's respect before, John wants to take this opportunity to impress him once and for all - and what better way than entering the MMA circuit himself?