Fishing village girl Su Nian mistakenly takes the place of her sister Su Xiujuan, who backed out of the marriage, to marry fisherman Lu Zhou. Lu Zhou seems ordinary, but actually runs a large deep-water bay fish raft. The couple work together with one heart to fight against unscrupulous merchants who monopolize the seafood market, stick to the bottom line of ecological aquaculture, cooperate with the law to crack down on bullying in the market, drive the development of local fisheries, and rely on solid work and entrepreneurship to interpret the patriotic feelings of ordinary people striving with integrity and guarding industry fairness.