In the peaceful kingdom of Paprica, the Church of the Holy Maiden serves its community through prayer—and through La Pucelle, the church's trained order of Demon Hunters. Prier, a sixteen-year-old girl, and her twelve-year-old brother Culotte are among La Pucelle's newest members. Ancient prophecy warns that the Dark Prince, favored servant of the fallen angel Calamity, will rise to scourge the world—and that a Maiden of Light will rise to meet him. Prier has decided, somewhat impulsively, that she is going to be that Maiden.