Abbott and Costello in Hollywood

Buzz (Bud Abbott) and Abercrombie (Lou Costello) work in a Tinseltown haircut salon where they usually just take a little off the side. But why not take 10% off the top instead? So the fellas become movie talent agents, setting in motion the lights-camera-comedy antics of Abbott and Costello in Hollywood, including Costello being mistaken for a prop dummy during the filming of a saloon brawl, Bud and Lou coping with insomnia, and a pursuit finale in the cars and on the tracks of a roaring roller-coaster. (official distributor synopsis)