This book features a new case for Hennessey and Yellich. Five years after Duncan Percival is rendered a vegetable after a vicious attack, he finally dies. It is now a murder investigation and DCI Hennessey and DS Yellich are brought in to renew the evidence and reinterview the suspects, along with DS Thompson Ventnor who worked on the original investigation. As they delve deeper, bodies start turning up and the links to a criminal gang become clear. But who is the leader of the organization, and who is pulling the strings now that Duncan Percival is dead? Hennessey, Yellich and Ventnor are drawn into York's criminal underworld where grasses are punished and the gruesome Chelsea Smile is the favoured method of retribution...