Ellie Jordan's job is to catch and remove unwanted ghosts. Part detective, part paranormal exterminator, Ellie operates out of Savannah, Georgia, the most haunted city in the United States. When a family contacts her to deal with a disturbing presence in the old mansion they've recently purchased, Ellie first believes it to be a typical, by-the-book specter, a residual haunting by a restless spirit. Instead, she finds herself confronting an evil that is older and more powerful than she'd ever expected. The dangerous entity seems particularly interested in her clients' ten-year-old daughter. Soon her own life is in danger, and Ellie must find a way to exorcise the darkness of the house before it can kill her, her clients, or their frightened young child.