Epic

Epic is an animated fantasy adventure movie based on the book The Leafmen and the Brave Good Bugs by William Joyce. Teenage Mary Katherine comes to stay with her father who is an eccentric scientist who believes there are tiny people in the forest who live in a faster mode where we can't see them. His life work is based on learning about these tiny forest people but Mary Katherine doesn't believe they exist, like everyone else in his life, and is trying to convince him to quit his pursuit.