It is Acting Detective Superintendent Nick Dixon’s wedding day. Gig rowers find a body floating in Bridgwater Bay and when the victim is identified as a serving police officer, executed at point blank range with a 3D printed gun, the assistant chief constable is soon knocking on Dixon’s door—wedding night or not.

It is the third such killing in as many weeks, but the first two victims were drug dealers, with no apparent connection to the dead officer other than the murder weapon itself.

Dixon must navigate a complex web of lies, corruption and betrayal. Taking charge of two major investigation teams, it quickly becomes clear that no one is who they seem. But is it two cases or just one? Is he looking for a motive that doesn’t exist? And can he find the gunsmith before another 3D printed gun finds its way into the wrong hands?