When 13-year-old schoolgirl Britney Hamil goes missing, DI Ray Lennox gets the sense that this might be the work of the infamous serial killer, Mr. Confectioner.

Following a devastating discovery, Lennox would love nothing more than to drown his sorrows at the pub, but he resists the urge. He meets the eccentric crime enthusiast, Baxter McClelland, who tries to elbow his way into the investigation.

Lennox interrogates S&M den owner Richie Gulliver - who refuses to reveal his whereabouts on the day of Britney’s disappearance. Meanwhile, Gillman and Leblanc are able to identify the man who murdered Fabienne and Gaston and Lennox begins to feel the strain of the case and the pull of his demons.

Convinced Mr. Confectioner is toying with his team, Lennox is determined to end it all - on his terms.

Confectioner continues to toy with Lennox and Drummond in a curious game of cat-and-mouse. And sensing he’s getting under their skin, he pushes further still, bringing up Lennox’s drinking problem.

Lennox and Drummond head to Leeds Police Station where they meet up with DCI Ken Custer to discuss their findings on the Confectioner. Lennox knows that in order to defeat the killer, he himself must regress, confess his shame, and show his weakness.