In order to save the world from a nuclear holocaust in 2045, Doc Brown must push the technological age back at least 50 years preventing Mattel Hoverboards and Mr. Fusion from being created.

When the owner of a struggling used car lot is killed, it's up to the lot's hot-shot salesman to save the property from falling into the hands of the owner's ruthless brother and used-car rival.

An aspiring painter meets various characters and learns valuable lessons while traveling across America.