Liu Lang, a Baji Quan heir with a passion for extreme adventure, is struck by lightning while crossing the Pacific in a hot-air balloon and unexpectedly transmigrates to the chaotic late Han dynasty in the fourth year of Jian'an. Armed with his family’s ancestral martial arts and a thousand years of historical knowledge, he lands at Woliu Ridge, where people hail him as an immortal sent from heaven. He wins Zhou Cang and Pei Yuanshao to his side, refines mineral salt to stabilize his troops, and trains elite soldiers to lay the foundations of his power. He crosses hands with Zhao Yun and navigates the chaos among the warlords. Seeking neither empty fame nor imperial power, he relies on his own abilities to aid the emperor and end the warfare. As a wandering swordsman, he defies fate to save the crumbling Han dynasty!