Chung Lui Society is a boxing gym founded by former legendary Muay Thai champion Chung Lui, who is dedicated to training professional fighters. Despite the gym's struggles, he remains committed to his lifelong philosophy of never backing down from a challenge. Businesswoman Elsa discovers that her boyfriend Daniel is cheating on her with Macau's female champion, Surewin. Driven by her competitive spirit, Elsa vows to settle their score in the ring. Upon learning that Surewin was Lui’s former student, Elsa seeks him out to train her.