Detectives Bishop and Pike fight crime together on the streets of East London, sharing a similar moral code despite their drastically different backgrounds. Bishop grew up being passed around foster families, desperately looking for a father figure, while Pike's father was the first black police commissioner, whose expectations he is struggling to live up to. Their deviating approach to life has been shaping an almost unbreakable bond between the two men, and their friendship is finally put to the test.
Arjana accuses Carmel of corruption as the full story about Ronald Pike Sr.'s shady past is uncovered; Ray manages to escape, prompting a deadly shootout.
Tanner orders Pike and his family into a safe house while Bishop and the rest of the unit track down Bakur; Arjana finds something suspect in Carmel's development; things heat up between Bishop and Nell.
Pike and Bishop stumble onto an organ-harvesting ring, ultimately leading to Pike's daughter being taken by the ring leader; Arjana agrees to help Deputy Mayor Carmel with a development deal.
Pike and Bishop are outraged when the Sharp case is moved to another unit and are instead reassigned to take down a local drug gang; Arjana needs money to fund a big opportunity at work; Pike must swallow his pride and ask his dad for help.
Nell alerts Pike and Bishop to a notorious wanted criminal, Michael Sharp, who is heading into London; the boys catch Sharp, but they are ambushed; Pike discovers Bishop staying in a cheap hotel after his split with girlfriend Sophie.