A policeman with a caved-in skull, his young wife found clutching the blood-stained murder weapon; it all looks pretty open and shut until Robbie detects the faint whiff of a defence and closes in on a witness who might cast a precious doubt on proceedings. So why is it, the nearer he gets to the truth and a possible acquittal, that Robbie's murder client becomes more and more eager to opt for a life sentence? In the midst of these hectic trial preparations, complications arise in Robbie's personal life. His love life may not be DOA but it's in a high dependency unit, his brother, a former soccer legend, has carelessly killed the daughter of a Glasgow gangster and has a price on his head while Robbie finds himself in the dock on a counterfeiting charge that looks set to end his career in the law. If only his life were as simple as that of the folk of the Vendee where Robbie's search for his elusive witness takes him and where, on the salt marshes of the Loire estuary, he hears the tale of the mythical Twinfish and suddenly everything seems a whole lot clearer.