Twelve-year-old Dre Parker could have been the most popular kid in Detroit, but his mother's latest career move has landed him in China. Dre immediately falls for his classmate Mei Ying but the cultural differences make such a friendship impossible. Even worse, Dre's feelings make him an enemy of the class bully, Cheng. With no friends in a strange land, Dre has nowhere to turn but maintenance man Mr. Han, who is a kung fu master. As Han teaches Dre that kung fu is not about punches and parries, but maturity and calm, Dre realizes that facing down the bullies will be the fight of his life.

Daniel moves to Los Angeles with his mother, Lucille, and soon strikes up a relationship with Ali. He quickly finds himself the target of bullying by a group of high school students, led by Ali's ex-boyfriend Johnny, who study karate at the Cobra Kai dojo under ruthless sensei, John Kreese. Fortunately, Daniel befriends Mr. Miyagi, an unassuming repairman who just happens to be a martial arts master himself. Miyagi takes Daniel under his wing, training him in a more compassionate form of karate for self-defense and later, preparing him to compete against the brutal Cobra Kai.