In a quiet neighborhood, in a house with all the modern conveniences, an innocent young girl becomes afflicted. Her mother can't help her. Doctors uselessly test and attempt to treat her. In desperation - fearing her illness reaches beyond the physical and into the spiritual -- her mother calls a priest. But even he doubts that evil has come into their home, into her body. And the more he doubts, the more powerful it becomes. There is only one cause, and only one hope for a cure.