For Billie Jean King (Emma Stone), there are more difficulties in playing professional tennis than worrying about potential injuries or missed balls on the court. As a woman, she's constantly putting up with double standards stemming solely from her gender and when her requests for payment equal to the payment male athletes receive, she decides to start up her own female-oriented tennis organization, one that's scrappy for sure, but full of grit and determination. They've got a cigarette sponsorship and numerous players, plus a hairdresser, Marilyn Barnett (Andrea Riseborough), with whom Billie Jean King begins to develop a romantic relationship with.
