Natalie McClellan lives with her mother, Claire, in the small town of McClellan, Tennessee. Claire has worked her whole life to keep Natalie from discovering that she is part of a family that has a dark past. One fateful afternoon in October, Natalie and her friends unwittingly unleash an evil witch. Two centuries earlier, a mysterious group calling itself The Circle had trapped the witch in a mirror. For hundreds of years, the mirror safely jailed the witch, until Natalie and her friends, Edward and Lucy, unwittingly unleash her evil. Despite the best efforts of the adults surrounding them, the children find themselves racing toward a fateful confrontation with forces far more dark and powerful than they can imagine. The children become convinced that they must somehow trap the witch again, as had been done years ago, before the witch finds a way to destroy The Circle and them.