Tiara, a skilled sorceress, and her familiar, Japolo, have been sent to Earth from the Guardian World, a realm of powerful beings responsible for maintaining the balance of magical energy. Their mission is to retrieve the Throne of Yord, a magical artifact that is the source of Guardian World's power and has to be returned before it falls into the wrong hands.

While tracking the artifact, Tiara encounters her old friend Lena, another sorceress seeking the Throne of Yord. Tiara's situation is further complicated by the appearance of Kagetsu, a man she once held strong feelings for. Kagetsu is a negater—a person with the ability to neutralize magic—and holds a close link to the Throne of Yord. Torn between the loyalty to her mission and the bonds with her friends, Tiara embarks on a difficult journey filled with unforeseen challenges.