At the end of Dayin Dynasty, the world will be in chaos.
In Qingshi Town on the border of the empire, due to an attack by horse bandits, three teenagers met a legendary figure who lived in seclusion in the back mountains - Li Mubai, the "Sword, Daring and Confucian Heart" who was famous throughout the world thirty years ago.
Fan Zheng, the son of a private school teacher, was frail but had the ambition to help the world. By chance, he embarked on the path of Confucianism. Liu Mu, the son of a blacksmith, is calm and courageous, with the blood of the generals of the Xiao family in Northern Xinjiang flowing in his body. Gaine, an Orion orphan, is lonely and stubborn. His father went to the mountains three years ago and never returned. He practiced swordplay day and night with a wooden sword in his hand, just to find out the truth.
Li Mubai accepted three people as his disciples and taught them all for three years - Fan Zhengxiu "Haoran Sword Song", using his literary heart to master the sword; Liu Mu practiced "Iron Clothes and Iron Bones" to awaken the Xiao family's bloodline; Gai Nie studied "Killing Sword Manual" to find the answer to "Who holds the sword for" in the killing heart.
Three years later, Xue Li, the leader of the Black Mountain bandits, led his troops to attack. Li Mubai burned his roots, fought off powerful enemies at the cost of his life, and gave his three apprentices a chance to escape. Before his death, he left three tokens and one sentence:
"Remember, no matter where you go, you must support each other. The three of you are brothers closer than real brothers."
From then on, the three young men carried their master's legacy and embarked on a long journey. They will be involved in family disputes in Qinghe City, face life and death in the depths of the earth, grow up in Jixia Academy, and sharpen their hearts in blood and fire.
They made a three-year pact.
Three years later, in the back mountain of Qingshi Town, in front of the master's grave.
How will they meet again then? What will the world look like at that time?
This is a story about brothers, inheritance and growth. One person and one sword can rule the world; three hearts and three ways can live up to the people.