Dummies (1928)

A young man is part of a traveling medicine show owned by an elderly "professor" and his beautiful daughter. His job is to keep the audience entertained with his ventriloquist's act (which includes a monkey) while the professor hawks his patent medicines. One day the show's receipts are stolen by a gang of thieves, and in order to impress the professor's daughter, the young sets out to catch the crooks and retrieve the money.