Cai Shuheng committed suicide and died, and everything restarted. Hundreds of years ago, the emperor was unable to rule the government and the public, so he divided the country into feudal states. The differences and estrangements between the countries grew day by day. After years of division and integration, four vassal states were finally formed: Qinglong in the East, White Tiger in the West, Suzaku in the North, and Xuanwu in the South. The four countries had their own unique resources and strictly restricted trade with each other. Cai Shuheng, as the leader of the Hongsu Gang of the National Guard of the Southern Kingdom, takes protecting the country's elixirs and cultivating them as her own responsibility. Although she looks docile, she is missing one arm and she killed many people when she was young. One day, a girl named Ruyi accidentally killed Cai Shuheng's long-time friend, Lu Zijin, the leader of "Fei" in the White Tiger Kingdom. Ruyi originally challenged Lu Zijin this time, and she made it her lifelong ambition to defeat Lu Zijin. She had challenged Lu Zijin many times and ended in failure. However, Lu Zijin was stabbed to death by her sword that day. When she was panicking, she was rescued by Zhai Xingchen, an orphan adopted by Cai Shuheng. Zhai Xingchen has outstanding charm, modesty and gentleness, and is proficient in medicine. However, he is shy when he is young and is often teased by Cai Shuheng. Lu Zijin's death did not cause turmoil in various countries, but someone should have deliberately suppressed it. Zhai Xingchen chose to travel to the South for his future livelihood. Five years later, a series of strange things happened again. Fake elixirs were widely used. Some people fell asleep, some grew old overnight, and some came back from the dead. At this time, the Qinglong Kingdom is watching with eager eyes, and the Emperor of the Imperial City has been ignored. Zhai Xingchen and Cai Shuheng, one seeks their own self-worth and the other seeks spiritual sustenance. They both have scars from their youth. In this crisis-ridden situation, they support each other and heal, but who knows whether this is destined.
Purpose: There will always be various hardships in life. No matter you are physically disabled or strong-willed or you are prosperous, people always have to find a support point for themselves. This support point is the meaning of life for many people.