In ancient times, the Yang Dragon and the Yin Dragon jointly protected the human race, but were later instigated by the demons to kill each other. Three thousand years ago, the Yang Dragon dismembered the Yin Dragon and suppressed it, and established nine dragon vein seals. After the Great Zhou Dynasty was established, Taizu got help from the remnants of the dragon clan and secretly cultivated a line of "Dragon Guardians". Three thousand years later, the seal was loosened and the reincarnation of the twin dragons triggered a dynasty crisis...
