An idealistic Charlotte Walsh leaves her job as a high-powered Silicon Valley executive to move back with her husband and three daughters to her downtrodden Pennsylvania hometown so that she can run for Senate in a midterm election that will decide the balance of power in Congress. She is initially shocked at how nasty her opponent is willing to play in the campaign, and how harshly she is judged by the media. She also sees that the strain wears heavily on her family. When a secret is uncovered by the opposition that could jeopardize her candidacy and everything she holds dear, Charlotte is forced to measure that cost against her ambition to make a difference.