Fisherman Shen Haichuan is pushed into the sea by his wife, Xu Li, and fishing tycoon Peng Wanshan, who have conspired against him. His six-year-old daughter is thrown into the sea with him. At the brink of death, he unexpectedly obtains the Seal of the Four Sea Dragon Kings and gains the divine powers of the Four Dragons. From then on, he explores the depths for precious catches and rescues people in danger. Gradually, he builds his own fishing fleet and joins forces with cold-storage owner Su Wanqing to turn their fortunes around. Those who once betrayed him gradually meet their downfall through their own greed. In the end, he gains success, family love, and a truly new home.