My sister An'an lives in a village where strange things happen frequently. Her brother hides the shell of "snail sister-in-law" for profit, turns her bath water into strange wine and sells it. My sister-in-law has pica, her abnormal behavior of frequent bathing, and the pink particles in the wine all hide mysteries. In order to make money, the brother actually wants to take advantage of the evil girl An An, and the peace talisman given by the seemingly kind-hearted Aunt Wang is actually a life-threatening talisman. When a rich man offers 200,000 yuan to buy "snail meat", his brother cruelly plots against his sister-in-law. After learning the truth, An An is determined to protect his sister-in-law and escape from his brother's control.