A gothic fantasy romance about Signa Farrow, an orphan who can see spirits and has a connection with Death, the Grim Reaper. After her latest guardian dies, Signa moves to the eccentric Hawthorne family at their estate, Thorn Grove, where she learns the family's matriarch was poisoned and her daughter, Blythe, is likely next. Signa must uncover the murderer with the help of Death himself, whose power she can access when she temporarily poisons herself, and a stable boy named Sylas.