The hunt for a serial killer who is stalking London’s West End becomes personal for Murphy when tragedy strikes at the heart of the investigation.

Parmer, a promising young police officer, has apparently committed suicide. Murphy is sent undercover to find out whether he was a victim of racist bullying.

Murphy has been asked by Interpol to be a part of an operation to infiltrate an international car-ringing gang. Soon he finds himself paired up with philosophising French agent, Benoit.

Murphy must go undercover in a biotech laboratory and comes up against a powerful adversary whom he cannot see.

A novice nun has apparently committed suicide and soon another nun mysteriously disappears. Murphy goes under cover as a priest to investigate.

Three convicted murderers have now been murdered themselves. The three have one thing in common: they have been named in a campaign run by a support group for relatives of murder victims. Murphy must find out if this is a coincidence or if someone if murdering convicted killers just for revenge.