The protagonist, Lu Chen, was an ordinary modern university student obsessed with Jin Yong's martial arts novels. After being hit by a truck, he transmigrated into the world of The Deer and the Cauldron. He gained a System with only one function: traveling between different worlds. In The Deer and the Cauldron, he began learning martial arts from scratch. His rapid progress aroused the jealousy and oppression of local powers, whose villainous agents hindered him from obtaining rare martial arts manuals and resources. The System also frequently issued impossible missions, such as breaking through to a certain martial arts realm in a short time and surpassing the strongest fighters of the age.
Lu Chen traveled between various martial arts worlds. Though he grew stronger, he was still weak when he first arrived in each new world and repeatedly suffered setbacks in battle. His progress was also limited by the strict hierarchies of the martial arts sects. As he interacted with people in each world, his efforts to obtain resources were often mistaken for theft, giving rise to countless lies and misunderstandings.
As his strength increased, Lu Chen entered the Dao through martial arts and became an immortal. After the System upgraded, he transmigrated to a world of immortal cultivation and attained the Golden Immortal realm. Then he discovered the deadly secret that the System was a fragment of an innate spiritual treasure, drawing the pursuit of powerful figures from every world. Though he continued to win as he grew stronger, those who helped him along the way made sacrifices, leaving his victories bittersweet. At last, during the Primordial Great World's Calamity of Ferocious Beasts, Lu Chen seized an opportunity with the aid of a spiritual treasure, repaired it, and became a Wuji Primordial Great Golden Immortal.
