In this supernatural thriller, Miriam needs a job and her friend Stephanie sets her up as a receptionist in her medical office to be her replacement. Stephanie turns up missing, however, and Miriam begins to question some of the strange people that work in the medical office if they know her whereabouts. A homeless woman outside the building keeps warning her that "Satan lives up in there" and Miriam soon finds out that the crazy woman's rants have more than a little truth to them.