Once upon a time in the mythical city of Uranopolis, an apocalyptic battle opposed humans to the the Winged Tribe; the latter was defeated and gradually went almost extinct. Now Xue Lie (Simon Yam), a royal descendant of the Winged Tribe, wants to avenge his his race and restore its glory: he is searching for the Naga Pearls, magical entities that can open a cataclysmic “eye in the sky” that would eradicate the human race. But Ni Kongkong (Darren Wang), a thief, has chanced upon the Naga Pearls and thus becomes the only one who can stop Xue Lie, with the help of Hei Yu (Crystal Zhang), a constable and descendant of the Winged Tribe, and Ge Li (Sheng Guan Sen), the son of the king of Uranopolis, eager to prove himself to his father.

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