Nagira learns of an artifact called ""The Fragment of Wisdom""; a mystical item that many Witches are now searching for. When he asks Robin about it, though, she claims no knowledge of the object. In spite of her answer, Nagira suspects that she is holding something back from him.

Suspicions about Zaizen's motives for Orbo leads Headquarters to cut funding by 40%. Nevertheless, Zaizen pushes ahead with his plan. Meanwhile, Robin and Nagira visit an old woman that was recently seen with Amon. When the woman is shocked to see Robin, they find out why; she has a photograph of a girl that resembles Robin in one of her bedrooms. Further investigations lead them closer to the truth behind Robin's past, as a link between genetics and Witches appears.

Robin and Amon finally confront Zaizen and learn the truth about Robin's existence. To Zaizen's surprise, instead of being traumatized, Robin is instead strengthened with resolve. Now Robin and Amon must stop Zainzen's final solution for the sake of both Witches and Humans alike.