Captain Daniel Sullivan hires Molly to go undercover inside the household of Senator Barney Flynn, whose wife, Theresa, has become the latest devotee of a pair of spiritualists known as the Sorensen Sisters. While Theresa is desperate to contact her dead child, kidnapped years before and never found, the police are sure the women are frauds. When Molly allows herself to be distracted by the unsolved kidnapping as well, it is a race against time to find the evil at work in the Flynn house before Molly herself becomes another victim.