Two years after the events of Valkyria Chronicles, Gallia faces a new kind of threat — not an imperial invasion, but a civil war. The Gallian Revolutionary Army, an alliance of disillusioned nobles and soldiers, has launched an ethnic cleansing campaign targeting Gallians of Darcsen descent. Their momentum is strong: Gallia's regular army is still exhausted from the war with the Empire, and existing laws prevent the formation of a national militia to fight fellow citizens.
With few options left, the government deploys military academy cadets to the front lines. Young, undertrained, and suddenly responsible for stopping a movement the adults around them cannot legally touch, the cadets must find a way to win.