Naive but good natured young man Albert Hockenberry (Baldwin) arrives in Washington, D.C., with plans to work for his late father's army buddy Harold (Gail), owner of the run-down District of Columbia Cab company. Aware of the sorry state of his business and from the growing competition from the popular Emerald Cab Company, Harold wants to clean it up but doesn't have the financial means to do so. Complicating matters is the motley group of cab drivers that he has working for him. They all see driving as a dead-end job while they wait for better lives, until Albert inspires them to work as a team. A valuable violin is found in one of the cabs, earning Harold and his wife a $10,000 reward as owners of the cab. Harold wants to share the money with the drivers and let them invest in the cab c