Jackie Moon is the owner, promoter, coach, and star player of the Flint Michigan Tropics of the American Basketball Association (ABA), the worst team in the league. In 1976 before the ABA collapses, the NBA plans to merge with the best teams of the ABA at the end of the season. Only the top four teams will make the move and the worst teams will fold. If the Tropics want to make it to the NBA, Jackie Moon must rally his team and start winning.

In 1976, a lower-middle-class teenager struggles to cope living with her neurotic family of nomads on the outskirts of Beverly Hills.