DCI James Craig is heading home to Fife for a family funeral after the discovery of his wife's uncle's lifeless body at home, having fallen down the stairs. The incident was classified as a Sudden Death, attributing it to the man's advanced age and fragility. Case officially closed.

Or is it?

Craig, inherently skeptical, approaches matters from a unique perspective, a skill honed on the streets of London. He hesitates to accept the neatly wrapped conclusion surrounding the old man’s demise.

As he contemplates letting the matter rest, certain details stand out, prompting him to reconsider the circumstances surrounding the death.

Craig reconnects with his former boss, now a Superintendent, from his probationary days in Fife. He requests permission to join the inquiry and is paired with DS Isla McGregor.

The two of them are soon caught up in a series of killings that stretch back years, back to the days when a young copper called James Craig was just starting out. A case that Craig remembers very well.

Because he almost caught a serial killer who was starting out on his own journey.

And now their paths are going to cross again.