After both his parents pass away, Zhou Chaosheng and his younger sister are cruelly treated in the family division by his maternal uncle, Shen Dacheng, and receive nothing but a rusty sea-subduing harpoon. The siblings endure constant bullying from the Shen family until Ye Xiaoman steps in to help them. The harpoon conceals divine power that allows its wielder to detect resources beneath the sea. Using it, Zhou Chaosheng ventures out to sea to make a living, befriending a spirit bird named A Lang and a sea beast known as King Zhang. Despite the Shen family's repeated attempts to sabotage him, he joins forces with the island's fishermen to establish the Qingyu Seafood Cooperative, build a live seafood market and processing plant, and create the trusted brand Qingyu Fresh Seafood. He and Ye Xiaoman achieve success in both business and love while protecting the livelihoods of local fishermen. Finally, the harpoon's third dragon-scale ring lights up, opening a new journey into the vast East China Sea.