The female ghost Su Wantang wanted to seduce the demon master Lin Shu and absorb his essence, but was subdued instead. She begged and told about the past three hundred years ago when she died before getting married because she was obsessed with her wedding dress. Lin Shu made an exception and refused to kill her and let her follow him. Along the way, they experienced incidents such as fox demons, ghost marriages, and nuns born with flowers. Su Wantang's obsession gradually deepened, and Lin Shu's frozen heart gradually melted. In the mirror of the past, Lin Shu faced the pain of his master's destruction. Su Wantang used Yin Qi to help him kill his old enemy, but his own soul disappeared. Before she died, she begged him to live well. After Lin Shu destroyed the Netherworld Sect, the Emperor granted him immortality. Many years later, he found Su Wantang, who was reincarnated as a tofu seller, and handed her a lotus leaf, continuing to fulfill the unfinished promise.