Forty-nine years after leaving Blackfen, Mabel Hart returns to her mother's abandoned cottage to prepare it for sale. The house remembers her. Something in the walls still taps out an old nursery rhythm. Webs thicken overnight. Shed skins appear where nothing should be. And the rhyme she knew as a child was never only a rhyme. As the cottage yields its secrets, Mabel discovers that her family has been feeding something ancient for generations. Coming home may cost more than her sanity. It may cost her body, her blood, and the last chance to escape the nest waiting for her.