The dark and disturbing tale of the skeleton of an unknown woman found in a hollowed-out tree in a Birmingham woodland. Delving deep into the mystery, the links between the woman in the tree and Nazi spy rings operating in Britain's industrial heartland are explored. While it appears both the remains and police files have vanished from the archives, interviews from those connected to the case and facial reconstruction experts piece the evidence together to finally put a face to the mysterious woman in the tree.