Seven years ago, a severe drought struck Qingshi Village. He Shoucai, the man in charge of guarding the water gate, seized the opportunity to charge exorbitant fees, forcing 43 tea-farming households to bow to his demands. Lin Dashan, Lin Xiaoman's father, clashed with him while fighting for access to water, leaving behind a receipt for 12,000 yuan. Seven years later, Lin Xiaoman brings the villagers together to publicly expose the old accounts, uncovering illegal concealed pipelines, fraudulent subsidies, and 180,000 yuan that has mysteriously disappeared. As the truth behind the water cutoffs, unpaid wages, and sabotage of the water gate comes to light, He Shoucai loses his tea plantation, property, and freedom. Finally, an intelligent water gate system is put into operation, making water usage publicly traceable. From then on, the water of Qingshi Canal is no longer controlled by one person but flows to every tea plantation that needs it.