Yu Qing, a volunteer teacher full of ideals, stepped into the isolated Gujing Village, but was interrupted by a series of strange things. The ancient well in the village that maintained their livelihood suddenly turned black. Villagers became sick after drinking it, and panic spread. However, village chief Zhao took the opportunity to declare that "the well god is angry" and used the excuse of "sacrifice" to make money. Yu Qing noticed something strange, and her rationality collided fiercely with the village's superstitious beliefs. Regardless of the villagers' obstruction and the village chief's threats, she resolutely launched an investigation. With the guidance of the elderly Uncle Li, the unintentional clues of the child Wang Xiaohu, and the scientific support of the village doctor Dr. Zhang, Yu Qing gradually uncovered the century-old secret hidden deep in the ancient well - it was not only evidence of industrial pollution, but also ironclad evidence of the village chief's corruption and fooling the villagers! When the old account books at the bottom of the ancient well come to light, a battle about faith, power and truth finally breaks out at the village meeting. Yu Qing used his knowledge and courage to completely shatter the superstition and lies that shrouded Gujing Village and brought light back to this land.
