The story of The Breaker follows Shiwoon "Shioon" Yi, a timid high school student who becomes the disciple to Chunwoo Han, a martial artist who is an enemy to the secret martial arts society known as the Murim. However, Shioon is naive and unaware of his master's shady past and the unseen underbelly of the society. How will Chun Woo manage to teach Shioon and help him survive in the world of Murim?