All Hallow's Eve, 1144. The savaged body of Durand Wuduweard, the solitary and unpopular keeper of the King's Forest of Feckenham, is discovered beside his hearth, his corpse rendered barely identifiable by sharp teeth.

Whispers of a wolf on the prowl grow louder and Sheriff William de Beauchamp's men, Hugh Bradecote and Serjeant Catchpoll, are tasked with cutting through the clamour. They must uncover who killed Durand and why while beset by superstitious villagers, raids upon manors and further grim deaths. Out of the shadows of the forest, where will the wolf's fangs strike next?