Brightheart the firefly is the hero of her bug village and ensures everyone is safe, night after night. When a robot, Aurora, arrives from space, it seems there's nothing it can't do! Aurora becomes the new town celebrity and Brightheart begins to lose faith in herself. Meanwhile, the evil king and his lackeys have been planning an attack on the village. Brightheart must find her light again and learn to work with Aurora to save the village before it's too late!