When Gavin's son, Kenneth, followed him into the Police Service, neither of them thought that he would make the headlines (or the statistics) as a valiant officer killed in the course of his duty. However, only days before Christmas, a routine raid on a cannabis farm turns into tragedy when Kenny is mown down by a fast-moving motor vehicle while attempting to arrest one of the gang.

Was this a bid to free the suspect? Or perhaps an attempt to silence him before he can reveal gang secrets to the police? Or was it a personal attack on PC Kenneth Hughes himself?

DCI Jonah Porter comes out of retirement to lead the hunt for this vicious killer, ably supported by his assistant, Bernie, and a team of detectives. Meanwhile Gavin and his wife, Chrissie, struggle to learn to live with the sudden loss of their only son in this poignant story of heroism and grief.