In Dusseldorf a German banker is stabbed to death. A month later an IT consultant is also fatally knifed in Dublin. The police have nothing to go on in either cases, no weapon, clues or motive and certainly no suspect. In the City of London, the players carve out a lucrative career. Harry Allsop is a top recruitment consultant who sources heads for global Investment banks. Diane Rubin relocates from New York and begins her own personal search for satisfaction. Bruce Villiers is a star foreign exchange trader who fights to hide the secrets of his stellar success and Adam Lewis and Samantha Perry are two young trainee traders who ask too many questions in their new jobs. Soon they fear that a serial killer is at large in Europe and working in the City may ultimately be murder for those who know too much.