The group enters the Kingdom of Femille, a land where only women are allowed, similar to the Amazons. The kingdom is governed by strict rules, with men forbidden from even passing through. The central focus is on the role of women who become priestesses, and the group is on a mission to investigate a mysterious spell that might be tied to the Claire Bible. They suspect that this spell may be used in the priestess’s purification ceremony, and they're determined to uncover the truth.
Zelgadiss Graywords is forced to disguise himself as a woman in order to enter the kingdom. He grumbles about the situation, but ultimately, the group manages to blend in, although Zelgadis is extremely uncomfortable with the disguise. He even receives compliments about how beautiful he looks, which only intensifies his frustration.
Their search leads them to a young woman named Miwan, who turns out to be the runaway princess of Femille. Miwan has fled from her role as a future priestess, a position her mother had arranged for her. She confesses that she doesn't want to follow the path set out for her and feels trapped in a life chosen by her mother. She longs for the freedom to choose her own destiny. The group sympathizes with Miwan’s plight.
The group discovers that in order to become a priestess, women must undergo a purification ritual involving the Fountain of Purity. To complete the ritual, the priestesses-to-be must touch a magical idol in the center of the fountain, which purifies their soul and body, granting them magical abilities. This ritual seems to be tied to the Claire Bible, which could hold the key to their mission.
However, things take a turn when they are confronted with a series of challenges. A mazoku infiltrates the kingdom, and the group finds themselves in danger. Zelgadis, still dressed as a woman, struggles with the ridiculousness of the situation, while Lina, ever the pragmatist, pushes forward in her quest to gather information. The group is forced to fight their way through various obstacles, including a magical trap set up by the kingdom’s authorities.
As the situation becomes more intense, Miwan finally comes to terms with her true self. Through the magic of the Fountain of Purity, which can detect lies and purify the heart, Miwan reveals that she was not always the girl she presented herself as. In fact, she was born a boy, but her mother forced her to live as a girl, believing that her true identity was shameful.
The revelation comes just in time as the group faces the wrath of the kingdom's rulers, who have caught wind of their actions. Miwan, now embracing her true identity, decides to forge her own path and all of the men who were forced to live as women for fear of repercussion finally come forward.