Skin : When the decomposed body of a young woman is found near railway tracks the police are convinced it's a suicide. But DI Jack Caffery is not so sure. He's on the trail of a predator, a brutal killer who waits, hiding in shadows. As Sergeant Flea Marley, a police diver and body recovery expert, works alongside Caffery, she is aware that her feelings for him may go beyond the professional. But then she finds something so unexpected - and so terrifying - that it changes everything. And she knows that this time, no one - not even Caffery - can help her . . .