The deposed prince Xiao Jin was reduced to a slave and suffered all kinds of humiliation. One night, his divine veins awakened, burning the sky with blood and crushing the shackles of the dynasty. The mysterious assassin Yun Zhao appears and carries a blood contract to help him swallow the dragon's veins and change his destiny. The second prince Zhao Huaijin secretly deployed a magic formation, Si Tianjian's orphan Liu Wuyuan tampered with the astrolabe, Tiehou led the remnant army to hide in the dark, and Bai Li's ice soul blood was quietly unblocking the ancient taboo. When divine veins and imperial power collide, who is the true son of destiny?