In the long-awaited follow-up to Three Bags Full, an enterprising flock of sheep must get to the bottom of just who—or what—is leaving a trail of grisly destruction in its wake.

With one solved mystery under their wooly belts, the time has come for the sheep of Glennkill to explore Europe. Together with their new shepherdess, Rebecca, they move into their winter quarters in the shadow of a French castle. But their new home is far from idyllic. Deer are dying an unnatural death in the forest. The goats from the neighboring pasture have a theory: a werewolf. Could that be real, or just a fantasy?

When the werewolf strikes a human, it becomes clear that even fantasies can be fatal. With the help of the strange goats in the neighboring field, the sheep follow the werewolf’s trail, in a desperate mission to save themselves and their shepherdess using their sheep logic, courage, and concentrated food.