Yan Qing, a single mother burdened with enormous debt, returns home in dire straits with her two children, only to be driven away by her snobbish elder brother and sister-in-law and subjected to endless humiliation. With nowhere else to turn, she lives alone on a deserted island, where she unexpectedly encounters a divine pearl left behind by the Sea God and awakens the extraordinary ability to control the ocean. Venturing out to sea at night to survive, she catches rare seafood to earn her first fortune, repays her debts, leases an entire stretch of ocean, and builds her own marine ranch. Facing harassment from greedy relatives, malicious attacks from unscrupulous capitalists, and deliberate framing, Yan Qing fights back step by step with divine powers and intelligence, protecting her children and her stretch of blue sea. Ultimately, she rises to become a revered guardian of the deep sea.