In 2025, every single piece of information on you is gathered and that information is used to control you. Kim Jinseong, whose job is to follow people around and gather information on them, was ordered to watch Seong Suyeong, a nurse. To watch her closely, he entered the Special Needs Home as a janitor...

At Sundeok's school, there is an old bachelor teacher, Kim Taenam. One day, he finds out about the Red Book from his local bookstore. And, the book spreads to the school as well. For her friends who want to read more of the Red Book, Sundeok decides to write the book on her own.

Set in the microcosm of a school mirroring a jungle-like society, the story centers around one boy's desperate struggle for survival. Lee Ji Hoon is set to play an up-and-coming tough guy within the bullying circle of an elite high school in Busan, who's got a secret in his past and an unexpected charm.