Suspicious deaths are not usually the concern of Police Constable Peter Grant or the Folly--Londons police department for supernatural cases--even when they happen at an exclusive party in one of the flats of the most expensive apartment blocks in London. But the daughter of Lady Ty, influential goddess of the Tyburn river, was there, and Peter owes Lady Ty a favor. Plunged into the alien world of the super-rich, where the basements are bigger than the houses, where the law is something bought...