At the end of the Ming Dynasty, Li Yu, the killer of Hongmen, broke into the Pharmacist Valley and was trapped in the Pharmacist Cave in order to save the poisoned helmsman. It was only after hundreds of years that he was rescued by an archaeological team. Li Yu came to Yuhai City and started a new life. He was intoxicated by the prosperity and prosperity of the modern city, and he quickly fell in love with this prosperous world without killing and hunger. However, under the calmness of the city, an undercurrent was surging, and Li Yu and other silent Together with the people, they sharpened their swords and took on the important task of defending peace.