Chen Qinglan, who was abandoned since childhood, was raised by an old Taoist priest and learned all kinds of Taoist techniques. In order to find his life experience and prove his Taoism, he stepped into the modern city and became a demon slayer who walked between light and shadow. During a dangerous mission, he was in danger of death because the spell failed, and was rescued by the mysterious woman Su Xiao. The two of them were together, and their love grew secretly as they shared life and death again and again. However, when Chen Qinglan finally found clues about her family, she attracted fatal revenge from the mastermind behind the scenes. During a journey to the ancient tombs in the northwest in pursuit of the truth, Su Xiao sacrificed himself to protect him, activating the ancient restrictions and dying. Although Chen Qinglan finally killed her enemy, she lost her love forever. She finally saw through the mortal world and took her ashes with her to hide in the mountains for which she sacrificed her life.
