In a world where literally the only thing that matters is being the coolest, EXO High's top contenders are challenged with an impossible task. Rival gangs, EXO K and EXO M swap leaders in a bet to see who will be first to officially accept an outsider into their loyal brotherhood. But what happens when unlikely friendships bloom, unexpected romance blossoms, and when utter chaos flourishes? The boys must keep their wits about them and use every resource available to win this epic battle.