Ballet, contemporary dance, and Korean dance. With Kang Daniel as the MC of the competition, 64 male dancers specialized in 3 different genres are here to compete with one other with nothing but their bodies! The dancers must outdo each another in order to climb up the hierarchy and place in a higher class. Those who fall behind become the Under and Second Classes, while those on top strive to remain in the First Class. How will this cruel war of dance unfold, and who will survive until the very end?