Amidst a blizzard, paranormal debunker Camille Burditt arrives at Devil’s Promenade in Oklahoma to research a supernatural 'spook light' phenomenon for her latest book. There she encounters a ghostly being, which she dismisses as a figment of her imagination. But as the apparition becomes too persistent to deny, Camille realizes the woman’s ghost is quite real—and that her demise was not accidental. Declan Rush—the inhospitable, reclusive owner of the inn where Camille is staying—is linked to the deceased woman, but he is less than forthcoming. Despite his unfriendliness, Camille is oddly drawn to him, even though she suspects his connection to the spirit might be that of killer to victim. When another suspicious death occurs, Camille intensifies her investigation. She has precious little time to ferret out the truth. Not only is her book deadline looming—she's desperate to discover if the man she’s falling for is a murderer.