White corridor

The unthinkable has happened at the Met's Peculiar Crimes Unit. With the Home Office poised to close the unit down, a key member of staff has been found dead, and suspicion falls on his colleagues. Unfortunately, the brilliant elderly detectives who head this most unorthodox of crime divisions, Arthur Bryant and John May, are stranded in a fierce blizzard in deepest Devon. Among the line of vehicles trapped on Dartmoor prowls an obsessed killer, edging ever closer to one very particular victim. With only their wits, woolly coats and a mobile phone with a fading battery, can Bryant and May solve two very different crimes?