The daily life of Arnold--a fourth-grader with a wild imagination, street smarts and a head shaped like a football.

Arnold and his friends must recover a stolen document in order to prevent the neighborhood from being bulldozed.

Howard Langston, a salesman for a mattress company, is constantly kept busy at his job, disappointing his son. After he misses his son's karate exposition, Howard vows to make it up to him by buying an action figure of his son's favorite television hero for Christmas. Unfortunately for Howard, it is Christmas Eve, and every store is sold out of Turbo Man. Now, Howard must travel all over town and compete with everybody else to find a Turbo Man action figure.