"Sister Ann believes she is answering a calling to be the first female exorcist . . . but who, or what, called her? In response to a global rise in demonic possessions, Ann seeks out a place at an exorcism school reopened by the Catholic Church. Until now these schools have only trained priests in the Rite of Exorcism - but a professor recognizes Sister Ann's gifts and agrees to train her. Thrust onto the spiritual frontline with fellow student Father...