Despite their investigative prowess, Chief Inspector Michael Sinclair, Lord Acton, and rookie detective Kathleen Doyle stir more than a few feathers at CID Headquarters when their relationship comes to light. But office politics quickly become trivial when a rash of underworld murders shatters London's normally austere facade. With a growing list of successfully solved cases to her name, the ever-dauntless Doyle shakes off the gossip and sets out to investigate the escalating turf war. As the body count climbs, Doyle uncovers a seedy world where fractious members of the Russian mafia and an Irish terrorist group are fighting for control of a lucrative underground business.