It is 1955, and the three Fayette sisters have lived their whole lives in the enchanting French Quarter of New Orleans. Though neglected by their parents, they share a close bond with one another—from afternoons in their small, shared bedroom, to trying to speak with ghosts beneath the sweeping trees in their garden. When the middle sister Constance disappears, the family believes she has run away, as she has done before; it is only the youngest—fourteen-year-old Bonavere (known as Bonnie)—who suspects there is more to it. Met only with grief from her family and resistance from the police, Bonnie embarks on a journey to bring her sister home, venturing through fabled Red Honey Swamp, and the city's vibrant and brutal history. Unravelling the layers of her sister's secret life, Bonnie discovers a pattern of girls found half-mad in the Louisiana swampland, and a connection to the wealthy, notorious Lasalle family. To rescue her sister, she must confront the realities of true violence, and the very nature of insanity.