Chelsea smile

A new case for Hennessey and Yellich - Five years after Duncan Percival is left in a vegetative state after a vicious attack, he finally dies. DCI Hennessey and DS Yellich are brought into investigate what is now a murder case. As they delve deeper, the detectives are drawn into Yorks criminal underworld where grasses are punished and the gruesome Chelsea Smile is the favoured method of retribution.