"A maverick Irish cop takes on the LONDON Crime World"
Detective Sergeant Tommy Murphy is a maverick cop with a dark past. After failing a psychiatric assessment, he's given one last chance by his boss and given a dangerous undercover assignment. A loner with little to lose and dealing with everything on his own terms, this time around, however, Murphy has an ally in Detective Inspector Annie Guthrie.
Murphy is called back to work after a leave of absence to be at his mother's side. His new job is to attempt to get close to Drew and Billy Johnstone, vicious Belfast criminals now operating in Leicester. Murphy thinks he's found himself a way in when a drug deal goes awry.
Working deep under cover, Murphy manages to gain the trust of Billy Johnstone, while trying to uncover the associations between his brother Drew and a local Asian criminal network.
Murphy ends up being exposed and caught up in a vicious and final showdown between brothers Drew and Billy Johnstone.