Hyun-rae suddenly loses his father and moves to Seoul alone. He tries to find a job, but without success. Out of desperation, he visits an orphanage, where he falls in love at first sight with Mi-mi, a kind-hearted woman who takes care of the children. By chance watching a boxing broadcast, Hyun-rae decides to become a champion and goes to a gym, but is only reluctantly allowed to practice. At the gym, Wang-son is already the main star, and he also has his eyes on Mi-mi. Kicked out of the gym due to his conflict with Wang-son, Hyun-rae continues to train with the help of Mi-mi and the children. Meanwhile, at the gym, Wang-son, who betrayed the director for money, decides instead to cultivate Hyun-rae as a promising prospect. Hyun-rae then confronts Wang-son with an ingenious method. Having received a secret power, Hyun-rae thwarts Wang-son's wicked schemes and finally claims the championship belt.