This film tells the story of Captain Hu Bayi and others who, after washing their hands in a golden basin, assist their friend Uncle Ming in going to the South China Sea to salvage pearls. Unexpectedly, they encounter a shipwreck and fall to the bottom of the sea, only to unexpectedly discover a millennium old sunken treasureThe story of the national ruins, where they went through numerous hardships at the bottom of the sea, eventually united and cooperated to defeat deep-sea giants, and cleverly used the mechanical devices inside the ruins to escape.