In the midsummer mining area, the Su sisters fall into predicament due to their father's disappearance, debts, and machine stalls. Aunt Guixiang bridges the gap, and Chen Tiesheng steps into the Su family. Without disliking the impoverished family, he fixes the old hoist, relies on his craftsmanship to go down the mine to pay off debts, guards the machinery, and secures the safety of the mining area. When the Black Wind Valley collapses and First Line Sky encounters danger, he risks his life to save the villagers; learning that his father-in-law is trapped at the bottom of the Black Cliff Valley, he carries the old man home step by step.