Prier and her brother Culotte are novices with the demon-hunting organization, La Pucelle. They've just passed their final exams and are ready to do real work fighting demons and zombies, but quickly find themselves embroiled in a series of plots orchestrated by a rival church with dark intentions. The gameplay is played on a tactical map, as teams up to six characters work to clear boards of enemies and dark energy. The unique `purify` command allows players to recruit monsters to their team and execute complex `miracle` energy attacks.
The game was ported to the PlayStation Portable in Japan on November 26, 2009 as La Pucelle Ragnarok.