A team of undertakers moonlight as diamond thieves, and the bodies are stacking up. Detective Sergeant Tommy Murphy goes undercover and discovers a nefarious connection with Japanese heroin dealers. Meanwhile, team leader Hatcher plans the most audacious heist yet. Murphy has to hold his nerve in an epic final showdown.

Richard Mooney, London's most infamous kidnapper, is brought in, and the race is on for Murphy and Guthrie to get a confession in time to save his latest victim, Kate Jennings. To crack Mooney’s silence, Murphy is set up as a suspected terrorist and goes undercover into Bellview to befriend him. But when this master plan is unexpectedly threatened by the prison's very own protection racket, time seems to be running out for Kate.

When world-famous Irish snooker player Mickey Munday comes under pressure to rig the outcome of his game in the forthcoming championships, Murphy and Guthrie go undercover to protect his life and find the culprit when he arrives in London. The stakes are raised for Munday when his long-lost love and daughter reappear in his life.

In the glittering world of the West End club scene, the head of security of a well-known East End gang is found murdered. Prime suspect: gang leader Carl Tate. In order to prevent another 'door wars', Murphy joins Tate's gang undercover, but when warfare escalates, Guthrie is compelled to join ranks on the doors of Tate's latest venture, X-Club.

Following a bungled attempt to close down an elaborate Russian crime-ring, Murphy and Guthrie find themselves embroiled in what appears to be a textbook crime of passion. An unknown blonde is busy murdering London's successful businesspeople. The only link is that all the victims are members of a state-of-the-art health club in the heart of the City.