Havers is on holiday in Cornwall, learning Akido, and Lynley is also in the county to visit his mother, when a local horse trainer is found hanged in a stable on the estate next to Lynley's. The dead man's money troubles suggest suicide, but then Lynley finds he had links with smuggling. Another lead suggests that the killer may be uncomfortably close to home. As the case develops, Lynley has to think out where his future lies - with the police, or managing his own property?

Lynley and Havers investigate the killing of a porter at the House of Lords. At first it looks as if the murder may be connected to the dead man's gambling debts, but then a senior clerk is also murdered, with evidence of a conspiracy involving stolen test reports on a new missile system. Havers traces the missing documents, but then she finds she and Lynley are both being followed...

The frozen body of a man is found on a meat truck in London's Smithfield Market, and on the body are a forged British passport and an Arabic manuscript on a page of vellum. The dead man appears to be an illegal immigrant - but was his death accidental? The manuscript turns out to be a page of an ancient Koran, hugely valuable. And Lynley finds himself locking horns with Inspector Brennan, of the Metropolitan Police's immigration department...