Once there was a young woman from a well-to-do New England family who never quite fit with the drawing rooms and parlors of her kin. Called instead to the tangled woods and wild cliffs surrounding her family’s estate, Margaret Harlowe grew both stranger and more beautiful as she cultivated her uncanny power. Soon, whispers of “witch” dogged her footsteps, and Margaret’s power began to wind itself with the tendrils of something darker.

Tabby has a peculiar gift: She can communicate with the recently departed. It makes her special, but it also makes her dangerous. As an orphaned child, she fled with her sister, Alice, from their charlatan aunt Bellefonte, who wanted only to exploit Tabby's gift so she could profit from the recent craze for seances. Now a young woman and tragically separated from Alice, Tabby works with her adopted father, Eli, the kind caretaker of a large Boston cemetery.

With the stroke of a pen, twenty-three-year-old Ivy Radcliffe becomes Lady Hayworth, owner of a sprawling estate on the Yorkshire moors. Ivy has never heard of Blackwood Abbey, or of the ancient bloodline from which she’s descended. With nothing to keep her in London since losing her brother in the Great War, she warily makes her way to her new home.

Maine, 1846. Gabriel Stone is desperate to escape the ghosts that haunt him in Massachusetts after his wife’s death, so he moves to Maine, taking a position as a minister in the remote village of Pale Harbor. But not all is as it seems in the sleepy town. Strange, unsettling things have been happening, and the townspeople claim that only one person can be responsible: Sophronia Carver, a reclusive widow who lives with a spinster maid in the eerie Castle Carver. Sophronia must be a witch, and she almost certainly killed her husband.

England, 1881. Hereford Cathedral stands sentinel over the city, keeping its secrets, holding long forgotten souls in its stony embrace. Hecate Cavendish speeds through the cobbled streets on her bicycle, skirts hitched daringly high, heading for her new life as Assistant Librarian. But this is no ordinary collection of books. The cathedral houses an ancient chained library, wisdom guarded for centuries, mysteries and stories locked onto its worn, humble shelves. The most prized artifact, however, is the medieval world map which hangs next to Hecate’s desk.