After a courageous escape from North Korea, Jina spends some time in a social inclusion facility in the south before moving to a small studio in Seoul. Free from the regime that controlled every aspect of her life, she takes the first tentative steps towards independence by taking a job as a cleaner. Money she desperately needs in order to rescue her father, who is still trapped in the north. While working at a local gym, she notices female boxers as they train. Awakening a fighting spirit inside her, Jina decides to enter the ring and compete.