Steve Punt turns detective to investigate a mystery from the Midlands.

In 1943, in a small wood in the village of Hagley, the body a woman was found inside a Wych elm tree. She had been put in feet first, alive or just recently dead. The police issued a good photo fit but, despite extensive enquiries, a match could not be found and no one reported her missing.

Punt hunts first for the files and then for the body. But things are not where they should be. He heads into those unsettling woods, rustles up tangled leads, and ends up barking up the occasional wrong tree.

He tracks down the 101-year-old forensic biologist on the case and investigates witchcraft and spying in his attempt to separate conspiracy from the truth.

And Professor Norman Fenton, expert witness in major criminal trails, subjects Punt's findings to analysis, building a unique model especially for the programme.

Producer: Sarah Bowen.