Young Chicken Little (Zach Braff) throws his small town into panic by claiming the sky is falling. Unable to find the piece of "sky" that hit him, he earns the town's scorn. A year later, outcast Little tries to redeem himself by joining the baseball team, helping to win a crucial game. Later that night he is hit on the head again and discovers that the "falling sky" is actually from a UFO. Now, Little must convince the skeptical town that an alien invasion is about to happen.