Qingxi Village is located in the folds of the mountains and is shrouded in fog all year round. The legend of Black Snake Ridge behind the village has been passed down from generation to generation - there is a snake demon that can take human form hidden in the mountains and specializes in hunting evil people for meat. No one took this seriously until the bullies in the village disappeared one after another, leaving no bones but strange snake scales on the ground. Lin Wan is an inconspicuous embroidery girl in the village. During the day, she twists threads with her fingertips to embroider beautiful things. At night, her eyes will turn dark green, her fangs will break through her lips, and her snake tail will wrap around her body, as she hunts for the smell of evil deeds. Those who bully men, dominate women, and commit evil deeds all become delicacies in her belly. Amid fear and secret pleasure, the villagers gradually discover that the existence of the snake demon has always been closely tied to the hidden sins in the village, and also hides a bloody past buried by time.
