In Maozhai, southeastern Guizhou, a Shui tribe girl named Ah Ruo was falsely accused of being cursed and expelled for guarding the terraced fields and resisting poppy cultivation. In a desperate situation, she accidentally awakens Hejiu, the remnant soul of the fog spirit, and gains the mysterious power to control the fog with her singing. Faced with the evil deeds of warlords who plundered mountains and forests and polluted water veins, Ah Ruo cultivated suspended terraces on the cliffs, used horsetail embroidery charms to repel insects, and relied on the rhythm of bronze drums to condense fog shields. The price of blindness, the contract in the spiritual world, and the conspiracy of the betrayer follow one after another. Can she use the power of a witch to restore life to the land eroded by poisonous weeds, and cultivate and weave a pure land amidst the fog and gunpowder smoke?