Twenty years ago, Zhou Desheng poisoned a fishpond out of greed, causing Yang Chaodong's father to fall into debt and suffer from chronic illness. Twenty years later, Yang Chaodong returned to his hometown to grow shiitake mushrooms, but Zhou Desheng planted poplar trees again to block the sunlight, trying to ruin his harvest. Yang Chaodong's rights defense met setbacks, and he accidentally learned the truth about the old case. No longer tolerating it, he cleverly used agricultural techniques to legally counterattack by building a hot-air drying room to bake and kill the poplar trees; the opponent took out loans to plant Chinese mahogany to provoke him, so he piled up waste fungus bags to attract longhorn beetles to gnaw and destroy the mahogany. Zhou Desheng went bankrupt and begged for mercy on his knees, but Yang Chaodong remained unmoved, joining forces with the village director to gather poisoning evidence to bring him to justice, taking over the industry and leading the whole village to prosperity.