When curator Laura Dean is discovered in a shallow grave in a remote woodland, Mathias and his team must delve into the young victim's life to unearth some shocking secrets. Meanwhile, Prosser - still reeling from the death of Iwan Thomas - calls on the help of retired Chief Inspector Robert Owen. The discovery of Iwan Thomas's body puts DCI Mathias on the firing line as he becomes the main suspect in Iwan's mysterious death. Matters are made worse when an independent investigator, John Powell, is brought in to help solve the case and invites DS Owens to assist with his enquiries. As tensions rise, DCI Mathias must attempt to solve the mystery surrounding Laura Dean's death and put his personal problems in the back of his mind.
