When he was seven years old, Zhang Wang smashed the iron lock and released the "crazy uncle" Zhang Huaian, who was locked up by the Zhang family next to the pigpen. Fifteen years later, Zhang Huaian has become a business tycoon, bringing a motorcade back to the village just to find the little nephew who secretly brought him steamed buns back then. But Zhang Wang is still exploited by his biological father, his mother is critically ill, and his life-saving money is snatched away. The old case, suicide note, IOU, and white bones under the locust tree are uncovered one after another, and Zhang Wang no longer kneels. The uncle and nephew join hands to seek justice, make the evildoers pay the price, and pull each other out of the deepest darkness. The rain stops, and he takes his mother out of Locust Tree Gulch, never looking back this time.