A desperate teenager is forced into the dangerous world of underground fighting to win enough money to save his ailing mother. He finds out what he's made of in the face of these violent hungry competitors.
After a few months of social adjustment training, the North Korean refugee Jina moves to a small studio in Seoul and starts her new life. To bring her father to South Korea, she needs money but no matter how hard she works, the discrimination doesn't let her save enough money. One day the broker introduces her to a boxing gym cleaning job. Seeing young and confident female boxers, Jina feels something burning inside.