Four students at the absolute bottom of Holy Hierarchy Academy's brutal social ladder cross paths in a rap battle. At this elite girls' school for future stars, the top-ranked students hold all the control, along with a prized drink, Hierar Milk, that fills whoever drinks it with a hunger to be number one. Rising means winning battles, and this year the contest is rap. Together, the four set out to climb from the bottom of the hierarchy to the top in this comedic music story.