Copper Inskeep holds Windydown Vale's deepest and darkest secret: he is the ghoul that haunts the Vale, donning a gruesome costume to scare travelers and townsfolk away from the dangers of the surrounding swamps. When a terrified girl claims she and her father were attacked by a creature - one that could not have been Copper - it threatens not just Copper's secret, but the fate of all Windydown . . .