In a world ruled by nine nations, a group of adventurers embark on a quest to find the Holy Eye of Numen. However, their journey is hindered by the Order of Hollow, an evil organization determined to prevent the Eye's discovery and threaten the fate of humanity.
Xy and Zao, the main protagonists of the story, are driven to find the Eye of Numen in order to uncover the fate of their eldest brother, Chaiser, who had set out on the same quest but never returned. With the hope of finding their brother and protecting their destiny against the Order of Hollow, Xy and Zao embark on a perilous journey filled with danger and adventure.
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