Lynn gripped the sides of the armchair, trying to put aside her own inner terror. 'I can't believe I'm thinking this, Ross. I'm not a violent person, even before Caitlin's influence, I never even liked killing flies in my kitchen. Now I'm sitting here actually willing some stranger to die.' The body of a teenager dredged from the seabed off the coast of Sussex is found to be missing its vital organs. Soon two more young bodies are found. Caitlin Beckett, a fifteen-year-old in Brighton, will die if she does not receive an urgent liver transplant. When the health system threatens to let her down, Lynn, her mother, turns in panic to the internet and discovers a broker who can provide her with a black-market organ — but at a price. As Superintendent Roy Grace investigates the recovered bodies, he unearths the trail of a gang of child traffickers operating from Eastern Europe. Soon Grace and his team will find themselves in a race against time to save the life of a young street kid, while a desperate mother will stop at nothing to save her daughter's life.