Left to her own devices Detective Sergeant Charlie West struggles with the responsibility of a full-blown murder investigation when a man is pushed off a cliff.

Veteran crime-solver Detective Inspector Munro has disappeared having blown up his own house to remove a nemesis from a line of inquiry.

Not ready to have her apron strings severed so soon, West eventually finds Munro who reluctantly agrees to shed light on the Ayrshire detectives’ most challenging case yet.

Once the police have discovered the identity of the dead man, and established his demise was definitely the result of foul play, the race is on to hunt down the murderer.

Given the victim’s links to a local drug ring there is no shortage of suspects, yet few of them are willing to share their knowledge with the police.

Can they work out why the man was killed? Will the murderer strike again? The detectives must act quickly before the case goes cold.