Ordinary young man Lu Chengfeng becomes an open-ocean diver to save his mother. On the verge of death, he awakens the Golden Right Hand Treasure-Hunting System, which lets him sense the location and value of ancient underwater relics. He saves Shen Tinglan, the head of the Shen family, and becomes her contracted son-in-law. With his special ability, he dives to explore sunken ships and appraises treasures. He foils plots amid internal clan power struggles and fights against the schemes of the Huo family. In the end, he reforms the lawless open-ocean diver circle and sets sail toward the legendary Golden Treasure Island.
