Hyung-soo is a member of the judo team at a high school in a small fishing town. He joined the team to avoid his alcoholic father, but due to him Hyung-soo quits the judo team. Hyung-soo tries to adapt to high school life with the help of friends. He gets to know a new group of kids at the school.

A famous psychology professor was killed under the motif of the murder game in the novel. But a young writer Han Joon conceals the killer for immediate success. As a result, Han Joon, the original author of the novel, is swept away by media and public opinion due to copycat crimes, and his life is turned upside down by sudden success. A month later, Han-jun received a threatening letter from Nuance that Han-jun knew the secret of Han-jun with a photo of the mysterious woman murdered, and Han-jun met the woman in the photo with Jeong-hyun, a young woman who helped him succeed.