The story of how Richard Williams served as a coach to his daughters Venus and Serena, who will soon become two of the most legendary tennis players in history.

Jackson and Helen are in love and about to have their first child when they move in with Jackson's mother, Martha, in order to take care of the family estate. But all is not well in this household. Martha is jealous of her son's affection for Helen, and, despite her Southern smile, she's starting to act strangely. As Helen tries to create a happy home life, Martha attempts to divide the family so that Jackson will become hers alone.