Huey Anthony Disward and Dalian travel to a remote village to investigate a Phantom Book rumored to be hidden there, only to be drawn into the affairs of a local lord's household. Six months earlier, a fire killed most of the family, and suspicion has fallen on the surviving daughter, Florence, whom villagers call a thorn-cursed bride. This single OVA episode, bundled with the manga's fifth volume, sends the Bookshelf's Keykeeper and Biblioprincess to unravel what really happened that night.