Fishing youth Haisheng goes out to sea to save someone, his boat gets damaged, and he is forced to borrow money from merchant Wan Haiba to repair his boat. He accidentally picks up an ancient fishing lamp on the reef beach. This lamp can illuminate the shipping lane in the thick fog and guard past returning sails. Wan Haiba covets the special ability of the ancient lamp and forcefully snatches it. Encountering danger and getting trapped at sea, Haisheng lets bygones be bygones, unites with the villagers to risk going out to sea for a rescue. After going through storms, everyone understands that the true meaning of the ancient lamp does not lie in divine power, but in human hearts tending towards goodness. Everyone takes turns on duty at the lamp house, helping each other, and guarding the peace of the entire bay.