On the edge of a French forest, a flock of unusually clever sheep - educated by bedtime stories and past detective work - face a chilling new mystery and the threat of a shadowy figure. Sheep have vanished, other animals too. The theory of a werewolf might be just a wild fairy tale, but when a human is killed, it becomes clear that even fantasies can be fatal. Miss Maple, Mopple and their woolly companions, aided by their goat neighbours, set out to reveal the truth. Armed with sheep logic, courage, and a steady supply of food, the flock follow the werewolf's trail determined to prevent any more bloodshed.