Fu, a dim-witted rabbit, is telepathically bestowed with ultimate kung fu powers after saving Shifu, a martial arts master, from a deadly attack. He makes a promise to return the martial arts academy tablet to Shifu's daughter, Penny. During his journey to the academy, thieves ambush Fu, and without his knowledge, Penny rescues him. As they travel together, they reach the academy only to discover it has been seized by the villainous Slash. While Penny engages Slash in a kung fu duel to reclaim her father's academy, Fu reveals his power and defeats Slash, thereby keeping his promise.