Carrie, a young religious fundamentalist, is abandoned by her missionary father and forced to move in with her mother and stepsister whose lifestyle conflicts with everything she's come to believe in. In addition to this new test on her values and faith, Carrie believes the new house possesses evil paranormal forces. In one terrifying night after her mother leaves on a business trip, Carrie and her boyfriend conduct an exorcism to rid the house of its supernatural presence. But, instead of purging the spirit, they awaken an even more sinister terror that now begins to haunt and torture them. Now, Carrie must overcome her own beliefs to protect her little sister and her own life...