- Highway 66 is a famous road. It carried thousands of people west toward California during the Dust Bowl.
- The families who crowd into their used cars learn how to listen to their cars. They listen for any kind of breaking-down sounds.
- On the road they meet mechanics and car salesman who again try to rip them off. These merchants tell them that they're silly to believe that there is opportunity in California.
- The families keep on keeping on.