The colleges of Cambridge shimmer beneath the sun of high summer. Beyond the city, the Fens lie quiet in the heat. In an agricultural equipment showroom, the half-consumed body of a young man sticks out grotesquely from the mouth of a shredding machine. Does this death mark the beginning of an unprecedented crime wave in this well-heeled community? Or is it just the latest in a story of corruption and brutal violence stretching back more than 20 years? For Detective Inspector Tom Fletcher; the secrets of the past are just as dangerous as the superbly-trained killer that he faces in the present.