Barry's obsession with Chuck Norris leads him to imagine himself as the action hero's sidekick in his own martial arts adventures. When he meets a karate instructor named Mr. Lee, Barry convinces him to be his mentor and train him in the ways of martial arts.
Throughout the film, Barry continues to struggle with his health and his school life, but finds solace in his karate training and his growing friendship with Mr. Lee. Together, they work on perfecting Barry's skills and developing his confidence.
As Barry's karate skills improve, he gains the respect of his classmates and stands up to his bullies. When his school participates in a martial arts competition, Barry and his team face off against their rivals in an epic showdown.
In the end, Barry discovers that he has the strength within himself to overcome his challenges and be a true hero in his own right, with or without the help of his imaginary sidekick Chuck Norris.