Shi Yao, founder of the Ashen Path in his previous life, was besieged by the nine great sects for creating a cultivation method that defied the heavens. In the end, he and his beloved Li Shuiyu perished together. Reborn at twenty, he carries the memories of his past life and the complete cultivation method of the Ashen Path, determined to change his fate. However, cultivating the Ashen Path requires using one's own body as a furnace, and every step brings transformation and pain. Even more dangerous are the sect elders who betrayed him in his previous life, the hostile forces coveting the Ashen Path, and the rejection of the Heavenly Dao itself. All will become formidable obstacles on his path after being reborn.
In her previous life, Li Shuiyu was dragged into the conflict and killed because she loved Shi Yao. Now reborn with her memories intact, she chooses to conceal her strength and secretly help Shi Yao while planning her own revenge. The two meet again amid revenge and protection, but the secrets and missions they each carry force them to struggle between love and hate.
As Shi Yao's cultivation of the Ashen Path grows, he gradually discovers an even greater secret behind it: it is no ordinary cultivation method, but a weapon from ancient times designed to oppose the Heavenly Dao. And those who betrayed him in his previous life seem to have reasons of their own, unknown to him. Faced with a choice between revenge and the truth, Shi Yao and Li Shuiyu must decide: continue down the Ashen Path and defy fate, or give up their power to preserve their humanity?
Theme: Apologizing to my eighteen-year-old self