Demons were rampant in ancient times, and many people signed contracts with demons for their own selfish desires. Jiang Dai (the heroine) was originally the apple of a rich man's family, but her family was ruined due to an accident. Finally, she signed a contract with the demon Shile in desperation, and became a frightening witch. Because of Tan Lin's words, the King of Hell hid the truth from the sky, killed Shi Le, and made Jiang Dai his right-hand man. From then on, Jiang Dai became a "ghost mission" who eliminated evil spirits in the world. When Tan Lin was working as a sweeper in the sky, he secretly observed her through the fairy mirror. He felt pity for her because of her life experience. Later, he slowly fell in love with her and redeemed her step by step.
Purpose: The heroine saves humanity, the hero saves the heroine