Ange and her friends stop in Bordeaux, home to Seren, Sasha, and Helvetica, on routine business. However, they couldn't have chosen a worse time, as the town is under threat by malevolent forces: a power-grabbing noble and a mysterious child who wields dark miracles. Things come to a head when the party's visit is thrown into chaos by an army of undead fiends! Beset on two fronts, the S-Rank party must fight to defend nobles and townsfolk alike—and the fate of House Bordeaux hangs in the balance.