Willing to bend the rules for her clients, Elizabeth Sloane (Jessica Chastain) remains one of the most sought-after lobbyists in Washington, D.C. When asked to help oppose a bill that imposes regulations on firearms, she instead joins a scrappy boutique firm that represents the backers of the law. Her defiant stance and determination to win now makes her the target of powerful new enemies who threaten her career and the people she cares about.