At the end of the Dayin Dynasty, the spiritual veins were exhausted, demons were in chaos, Xuanmen was in decline, and the remaining sects barely maintained order in the world with incomplete magic. Legend has it that the ancient Taoist secret code "The True Interpretation of Earthly Evil" records seventy-two magical powers that, when collected together, can reshape the spiritual veins. However, due to the power of backlash, they were separated and sealed in the demon's body, becoming the core of the struggle between the monks and the demon. Shen Yan, the last disciple of the declining Xuanmen "Qingyun Sect", was born with a "spiritual aperture" but was unable to practice conventional magic. He had a forbearing and tenacious character, and was responsible for the sect's blood feud. He accidentally obtained the fragment of "The True Solution to the Earthly Evil". He had to kill the corresponding demon to unlock the magical power, and every time he used the magical power, he would suffer the backlash of the demon's remnant soul.
