The first body is found in London's East End - a middle-aged woman, brutally murdered. The second body turns up in a disused quarry, attracting the attention of DI Carter and DC Willis. They had interviewed the dead man, JJ Ellerman, about his links to the first crime, and somebody wanted to stop him talking. And then the third body is found, and it becomes clear a serial killer is on the loose. What connects the victims? And who will the killer go after next?