Somewhere between belief and doubt lies faith. For the second time in her marriage, Mariah White catches her husband with another woman and Faith, their seven year old daughter, witnesses every painful minute. In the aftermath of a sudden divorce, Mariah struggles with depression and Faith seeks solace in a new friend… a friend who may or may not be imaginary.

Faith talks to her "Guard"constantly; begins to recite passages from the Bible— a book she's never read. Fearful for her daughter's sanity, Mariah sends her to several psychiatrists. Yet when Faith develops stigmata and begins to perform miraculous healings, Mariah wonders if her daughter-- a girl with no religious background-- might indeed be seeing God. As word spreads and controversy heightens, Mariah and Faith are besieged by believers and disbelievers alike, caught in a media circus that threatens what little stability they have left.