The story of Katherine Ann Watson, a feminist teacher who studied at UCLA graduate school and in 1953 left her boyfriend behind in Los Angeles, California to teach at Wellesley College, a conservative women’s private liberal arts college in Massachusetts, United States.
12-year-old Regan MacNeil begins to adapt an explicit new personality as strange events befall the local area of Georgetown. Her mother becomes torn between science and superstition in a desperate bid to save her daughter, and ultimately turns to her last hope: Father Damien Karras, a troubled priest who is struggling with his own faith.