Underground, Vol. 1: Fight Club follows Karim Yun, a biracial taekwondo fighter, as he navigates New York’s brutal underground martial arts scene. Seeking revenge against the gang that shattered his Olympic dreams, Karim confronts a colorful cast of combatants. Battling a life-threatening illness caused by the attack, he must balance his thirst for vengeance with his health. Will he succumb to the allure of secret mixed martial arts contests? Explore the world of underground fight clubs in this thrilling sports manga by black belt martial artist JR De Bard.