Your cousin, Wonwoo—whom you haven't seen in a long time, invited you to support him in the largest street racing event in Seoul. He told you he was a part of the Sebong Brawlers, one of the top five notorious gangs affiliated with the underground street racing scene. Once he introduced you to their top no. 1 racer, Jeonghan, a.k.a. Angel—your interest piqued, curiously wanting to understand why some people say he's dangerous when he looks just like what they call him; an angel.