When autumn storms unearth ancient bones on Castle Green, Merrily Watkins, diocesan exorcist, finds herself facing a storm of her own. A new bishop seeks to modernize the Church, threatening to phase out archaic practices like exorcism. But the past refuses to stay buried as Merrily investigates a series of disturbing events in a remote, centuries-old house.
Drawn into a world of ancient legends and modern anxieties, Merrily uncovers a hidden history of insidious abuse linked to a malevolent force. As the darkness closes in, she must confront not only the supernatural but also the very foundations of her faith. Can she protect her community from a terror that defies explanation, or will she become its next victim?