Henry Pierce has a whole new life - new apartment, new telephone, new number. When he checks his machine, he discovers messages for a woman named Lilly, and she is in some kind of serious trouble. Pierce is inexorably drawn into Lilly's world, and it's unlike any world he's ever known. It is a night-time world of escort services, websites, sex and secret identities. Pierce tumbles through a hole, abandoning his orderly life in a frantic race to save the life of a woman he has never met.

Pierce traces Lilly's last days, but every step into her past takes him deeper into a web of inescapable intricacy - and a decision that could cost him everything he owns and holds dear...