Christy Martin (Sydney Sweeney) never imagined life beyond her small-town roots in West Virginia—until she discovered a knack for punching people. Fueled by grit, raw determination, and an unshakable desire to win, she charges into the world of boxing under the guidance of her trainer and manager-turned-husband, Jim (Ben Foster).

But while Christy flaunts a fiery persona in the ring, her toughest battles unfold outside it—confronting family, identity, and a relationship that just might become life-or-death.