Randy Cunningham, a 9th grade kid, becomes a ninja and is to protect Norisville High School. But how long can he keep the secret from his best friend Howard Wienerman? Especially since Howard wants them to meet the ninja together? Randy and Howard try to get into a cool zone in the bleachers when watching their school play basketball. When one of the triangle-playing band members is fired, The Sorcerer turns him into a ferocious monster.