Author Emma Larsimon, known for writing horror stories, is haunted by nightmares involving a witch named Marianne. She decides to stop writing and returns to her hometown in an attempt to confront her fears. Soon, she realizes that the evil creatures that once existed only in her nightmares — and in her fiction — begin to manifest in reality. Emma must investigate the past of her own story — her childhood friends, her family, the place where she grew up — to uncover the origin of Marianne and try to put an end to this terror.