Detective Nikki gets a series of anonymous calls. But the messages are in a secret language used only by villains. Nikki and her team must decode the riddles and work out where the threats are coming from. Meanwhile, the Fens are hit by a series of "designer burglaries." It appears that a new gang of thieves are stealing to order. Things get very close to home when a friend of Nikki's mother dies suddenly and suspiciously. Are these events connected - and can Nikki stop the thieves on the Fens before anyone else dies? The Lincolnshire Fens: great open skies brood over marshes, farmland, and nature reserves. It is not easy terrain for the Fenland Constabulary to police: with remote Fen villages, dangerous and often misty lanes, and poor telephone coverage. There are still villages where the oldest residents have never set foot outside their own farmland. A visit to the nearest town is a major event. But it has a strange airy beauty to it, and above it all are the biggest skies you've ever seen.