In the kingdom of Paprica, the city of Pot a Feu is home to the Church of the Holy Maiden, and attached to the church is a select unit of trained demon hunters called La Pucelle. The newest members are Prier — a sixteen-year-old with ambitions larger than her rank — and her twelve-year-old brother Culotte. The legend that drives Prier is old and specific: when the Dark Prince, favored servant of the fallen angel Calamity, rises to scourge the land, a warrior known as the Maiden of Light will challenge him and restore the balance. Prier intends to be that warrior. The story unfolds in chapters, each with multiple possible endings depending on what La Pucelle discovers and how they respond to it.