Due to his family's poverty, Jiang Yan goes out to sea as a salvage diver with his cousin Jiang Tao. In Ink Tide Bay, he uses his Heaven-Given Golden Eyes to discover gold bars, only to be abandoned underwater when Jiang Tao cuts his safety rope and steals the entire fortune. Determined to go their separate ways, Jiang Yan meets Su Wanqing, a manager at Hansheng Trading. He ventures into ruins four thousand meters beneath the sea, obtains three mysterious ancient pearls, and becomes bound to the Tide-Guide Pearl. When the villains Qin Dong and Su Guoliang relentlessly try to seize them, Jiang Yan fights desperately to protect the Sea Eye. In the end, he understands the wisdom of the ancient teachings, turns over the cultural relics, and safeguards the four seas.