He Yichen, the youngest law enforcement elder of Xuantian Sect, is a cold-blooded and ruthless god of death in the eyes of the world. He killed three hundred traitors with his own hands, staining the clouds with blood, but no one knew his secret of healing the lonely disciple late at night. Once he accepted a disciple, he chose Su Wanqing, a good-for-nothing girl who had been abandoned by her family. The two masters and apprentices depended on each other. He taught each other everything on the road of cultivation, and she planted warmth in his cold heart. However, a conspiracy arose. The bully supporting actor Zhao Tianba coveted Su Wanqing's natural spirit body and designed to frame He Yichen for betraying the clan. In order to protect his apprentice's life, He Yichen cruelly expelled her from his master's school and endured eternal disaster alone. Five years later, Su Wanqing returned strong, only to find that her master had lost all her cultivation and had become a mortal. The crematorium opened for his wife, and she vowed to protect him, but she didn't know that a greater crisis was approaching. The love between master and apprentice is deep, passion grows, and a legend of changing fate begins.