Finnish investigator Jessica Niemi is back in this terrifying new novel from the author of The Witch Hunter. Six months have passed since Jessica's encounter with the mysterious serial-killing coven of witches and the death of her mentor Erne. Her nightmares about her mother and the witchcraft that undid her have only gotten worse, but she's doing what she can to stay focused. Her homicide squad, now under new leadership, has been given a murder case and a new series of disappearances to investigate. A young woman's corpse has washed up on an icy beach, and two famous Instagram influencers have gone missing at the same time. The missing influencers and the murdered woman all have ties to a sinister cult. Jessica finds an eerie painting-of a lighthouse on a frigid island-as she investigates and under the picture is a gruesome poem detailing a murder. The nightmares about her dead mother have intensified and seem all too real, making Jessica wonder if the woman might be trying to tell her something about the killings. And as Jessica works frantically to solve her latest case, her terrifying past and the coven of witches that almost killed her shockingly reemerge and threaten to destroy her.