'Miracles From Heaven' focuses on faith and struggle

There's one thing you'll need when you go see "Miracles From Heaven." A box of tissues.

The film details the true story of Anna Beam, the middle child in a happy family until a rare digestive disorder threatens her life. The rated-PG story focuses on themes of faith, love and struggle, and is sure to make your eyes moist.

"It's a hard journey when you see a child in peril, when you see a child in pain," said Jennifer Garner, who plays Anna's mother.

"But the movie isn't about that. The movie is really about this incredibly inspiring and uplifting end to the film and just watching a family get through something hard together."

"Miracles From Heaven" opens March 16.