The Su family found their real daughter Su Qingyuan, who had been missing for eighteen years, but found that she carried a mahogany sword with her and could see ghosts in the house. The fake daughter Su Wanqing looks gentle on the surface, but secretly uses spells to suppress her resentment. When the century-old mirror reveals the truth about the evil ghost, the two are forced to join forces, using blood as a guide and talismans as blades to discern the authenticity of people's hearts and the confusion of life and death amid family secrets and yin and yang intrigues.