To survive in Gangbuk high.

In the heart of Seoul's Gangbuk district, a fierce rivalry ignites between two high schools: South Gangbuk High and North Gangbuk High. At the center of this power struggle stand Kang Joon-ho, the undefeated "Iron Fist" of South Gangbuk, and Kim Min-jun, the mastermind known as "Shadowstrike" from North Gangbuk. Their dominance is shaken when a mysterious figure, Kim Soohyun, emerges, wielding a unique blend of ancient martial arts. Soohyun's battles challenge the status quo, sending ripples through both schools and the city.