When a crimson-black rift tears through the skies of Remnant, Team RWBY is ripped from the chaos of Beacon and thrust into the heart of a dying world: Sera. Awakening in the brutal, subterranean confines of the Slab, Ruby, Weiss, Blake, and Yang are thrust into the middle of E-Day-the Locust Horde's apocalyptic invasion of humanity. Mistaken for young COG conscripts, the girls are forced into a desperate alliance with Delta Squad. To survive the meat-grinder of Sera's brutal military conflict, they must trade their high-flying Dust tactics for the cold reality of Lancer rifles and chainsaw bayonets. As they fight alongside Marcus Fenix and his team, the line between Huntress and soldier blurs. They will learn that the war against the Locust is a fight where optimism dies fast, but bonds forged in mud and blood are meant to last forever. Faced with the nightmare of the Hollow and the weight of a war that has raged for years, Team RWBY must evolve or be consumed. But when the path back to Remnant finally opens, they are forced to choose: return to the home they once knew, or fight for the future of a world that is already broken. The Huntresses have returned home-but they are no longer just students. They are the Crimson Gears.

Pax Pacis, The Peace Corps, holds total dominion over Mundus. The people however, are getting restless. So many of the citizens are unhappy with the way of life. The never ending struggle of love and hate, the tireless jobs that they must constantly take part in. It is all work no play in this Dystopian Society. When Payce Lesterium, son of Kevan Lesterium, leader of Pax Pacis, begins forming a Rebel army. tensions begin to rise. The Divisions begin to crumble and turn against each other and Pax Pacis must discover a way to keep hold of its power. Ethne Sotriell is the key. But is she the key to Pax Pacis? Or to the Rebellion?