Zhang Ahai, the last "Longsu" successor of the Zhang family, possesses the dual powers of dragon energy and dragon spirit - immortality, infinite strength, and the ability to protect the body with dragon energy and control airflow. Since the early years of the Republic of China, he has carried the blood feud of his father being hunted by Shen Yehui and walked low-key in the tide of the times. From the old land where warlords fought to the modern city with bright neon lights, he has always guarded the secret of the "Longsu Altar" that contains the source of Longsu's power.
Shen Yehui, a top martial arts organization that has been secreted for hundreds of years, takes "hunting those with extraordinary talents and seizing the dragon's blood" as its mission. Its masters have a strict hierarchy, from prefectural-level teams to super-elders, who all covet the blood of Dragon Su in order to break through the realm. When Shen Yehui's cold iron blade cut through the tranquility of Shanghai's rainy alleys, the air barrier of the day-level masters, and the dragon-breaking bombs and explosives of the prefectural-level team pressed forward step by step. Zhang Ahai, who had been hiding for a hundred years, finally no longer flinched - he cut the iron chain with his dragon fist and protected the innocent with his dragon spirit. In the confrontation between the secrets of the old house of the Republic of China and the modern city, he gradually tore open Shen Yehui's hunting net.
And with the arrest of Li Xuan, the super elder who killed his father and his enemy, the "Heavenly Realm" president behind Shen Yehui who lived for nearly a hundred years is gradually coming to light. This is a battle of protection that spans centuries: to protect the hometown, avenge the father, protect the altar, and more importantly, use the body of Long Su to prevent Shen Yehui's conspiracy to control the dragon's energy and subvert the order. When the loneliness of immortality meets the obsession of immortality, when Longsu's mission collides with the ambition of martial arts, Zhang Ahai's century-old secret hides an ultimate contest that can rewrite the times.
