It is the first of April, and something is about to happen that will lead to something big. Lay, Luhan, Chen and Baekhyun cannot resist the urge to go on a pranking spree, and they decide to start from the first of April. The unfortunate victims? The rest of EXO. Of course, there's no way the other members will let the pranksters off so easily, and thus begins EXO's first prank war.