Fraternal twins Tabby and Sage Winslow own The Book and Candle Shop in Savannah. Sage is hot-headed and impulsive while Tabby is calm and collected, making them the perfect partnership. Blithe McAdam had been seen in a heated argument with shop clerk Gerard-- and later found dead from a blow to the heat. The twins are convinced of Gerard's innocence and start digging into Blithe's past. The neighbor who found the body isn't talking, medical examiner Quig won't give any details about the autopsy, and nasty rumors begin surfacing about the drowning of Blithe's father years earlier. With the clock ticking, the twins find themselves in the grip of an unseen and deadly energy that has seeped into their midst-- and into the sights of a ruthless killer. -- adapted from jacket