Newly assigned to CID, Detective Constable Elizabeth Burnet needs to prove herself more than most. In an era rife with misogynistic attitudes, some see her as little more than a pretty face hired to make the department more palatable to the public, giving her the nickname 'The Friday Girl'.
So when she stumbles across evidence of a nascent serial killer - dubbed "The Werewolf" by the local press - her theories are dismissed as the product of an overactive imagination, and the more she tries to persuade people of the truth, the more she's alienated from her colleagues. But the killer is out there, hunting for their next victim in the Templeton Woods.
The only person who believes Burnet is a recently dismissed detective with his own agenda: exposing corruption within Tayside Police. Working together, they soon realise that some within the police force may have their own reasons for covering up the recent deaths. And as the killer is exposed, Burnet uncovers the mind of a monster pushed to the edge.