This is 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 re-interview 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...