A group of professional killers, known as The Office, are carrying out hits for the Iranian government across the European continent, hitting targets amongst the wealthiest and most privileged.

After a slew of murders in London, MI5 decide that enough is enough. The Office must be destroyed, root and stem.

Dan 'Spider' Shepherd, the secret service's most dangerous weapon, is tasked with infiltrating the organisation and unmasking its leader.

But just how far is he willing to go in the name of justice . . . ?