1978, Scotland. An ambitious killer hunts neighbourhood pets before seeking larger prey. As Detective Burnet battles to find the truth, her search leads to a bloody, terrifying conclusion . . .

Newly assigned to CID, Elizabeth Burnet is seen as just a pretty face. So when she stumbles across evidence of a serial killer, dubbed "the Werewolf", her theories are dismissed. The only person who believes Burnet is a former detective with his own agenda: exposing corruption within Tayside Police. Together, they realise that some in the force have reasons for sweeping recent deaths under the carpet.

But someone is still out there, pursuing victims in the Templeton Woods. As Burnet reveals the killer's identity, she also exposes the mind of a monster pushed to the edge.