A 5,000-yuan scholarship reward earned Zhang Yang, a young man who returned to his hometown, a debt of gratitude he carried for years. To repay his fellow villagers, he took over a shut-down coal mine despite going into debt, built roads and schools, and subsidized affordable coal for years. But just before a cold wave arrived, shortly after he announced an additional ton of coal for every household, he was accused of profiteering, and some even wanted to take over the mine. It was only when a coal coupon exposed a shocking price difference that the truth began to emerge: the mine charged 70 yuan, yet villagers paid 600! Who was exploiting the villagers' goodwill for personal gain? Zhang Yang decided to personally investigate every account from beginning to end and uncover the whole truth.