The Yellow River bursts its banks, and turbid beasts eat people. I am Lin Yan, a refugee orphan. Master Zhou Wangshan taught me with his life: "We are not guarding the city, but the people who are eating behind us." He used his own life to fight the disaster and died with the turbulent tide. He left me half a mountain and river seal, a handwritten note, and an unclearable case of collaborating with the enemy. I was admitted to Zhen'e Academy and was ridiculed by aristocratic families for being a mud-legged and homeless kid. It doesn't matter, my sword is only used against turbid beasts. The Zhuo Party colluded with King Zhuo to cause trouble and harm the people, and the Prime Minister of the DPRK was their leader. I want to take back the master's revenge and the people's blood one by one. Until I stood on the city wall of Heyuan Town, with tens of millions of people behind me and the turbid tide in front of me. In this battle, I will seal my body with my body, and I would rather break my bones than retreat. "It is not the city that is guarded, but the people who are eating behind them." The Yellow River is safe and the mountains and rivers are safe - this is what I want in this life.