John Davidson: diagnosed with Tourette's syndrome at a young age which alienated him from his peers, he struggled with a condition few people had witnessed.

It's 1969 at a strict English girls' school where charismatic Abbie and intense and troubled Lydia are best friends. After a tragedy occurs at the school, a mysterious fainting epidemic breaks out threatening the stability of all involved.

With a serial killer claiming victim 13 and rumors of corruption in their force, the West Yorkshire cops are told to cooperate with a team from outside - Peter Hunter and two hand-picked associates. Hunter gets little help but plunges ahead, discovering that one of the 13 victims may have a different killer. This part of the investigation leads to late-night calls, another murder, and bureaucratic moves to push Hunter aside: he may be getting close, not to the serial killer but to bad apples in the force. Christmas approaches.