Ben is thrilled when his mom signs him up for taekwondo--especially when his best friend, Emilio, signs up too. During their first class, it becomes clear that Emilio is a natural. Ben, meanwhile, struggles to keep up. He is frustrated and embarrassed . . . until he runs into Mr. Wiz, the mysterious janitor from his school, at the studio. Mr. Wiz gives Ben a black belt, and suddenly Ben's skills start to progress. What's behind the sudden improvement?...