Ten years after the fall of the former Sui Dynasty, undercurrents surged. Yang Xuance, the deputy commander of the Xuanjia Guard, used the Iron Cross birthmark as a key to get involved in the maelstrom of Chang'an: the blood curse crisis revealed that the prince had forged secret documents, and the Yellow River water battle counterattacked the Anlushan Five-Tooth Warship. However, in the process of rescuing his brother, he was shocked to find that he and his sworn brother were orthodox twins, and that Nazha's "legitimacy" identity actually hid the mystery of forgery.
Hu Shangmeng used Holy Fire gold coins to infiltrate the economy, and used serial conspiracies such as the Silk Road deadlock and the Jinwu Guard Incident to shake the foundation. Yang Xuance used double-sided layouts, Holy Fire countermeasures and other tricks to break the situation. The truth about the Suiye City massacre revealed the bond between her and An Lushan's adoptive father, and the "orthodox touch" ceremony at the Chengtianmen martial arts field united the people. However, in the final chapter, ironclad evidence of Nazha's collusion with the Hu Shangmeng was revealed - her former Sui bloodline and the national jade seal were both forged, and the real Xuanjia orthodoxy was actually her sworn brother Yang Xuanyu who faked his death.
The strategic duel runs through the sea and land, from the Iron Cross Water Formation of the Yellow River to the Nanyang Wolf Head Warship, from the secret passage mechanism of the inner court to the purge of the Jinwu Guards. In the game between the bloodline puzzle and the hearts of the people, Yang Xuance realized that orthodoxy is not determined by the bloodline, but by the support of the people. The first volume ends with Nazha defecting and her sworn brother appearing in Nanyang. The undercurrent recedes and rises again, and the true legend of Xuanjiawei has just begun.
