Lu Zhenhai uses his extraordinary ability to identify fish by listening to their sounds to work tirelessly for his cousin, Lu Jiancai. Despite hauling in over a thousand jin of premium yellow croaker in a single catch, he receives only 25 yuan, while his family's desperate need for baby formula is met with indifference. Furious, he quits and sets out on his own, taking over an old boat and founding Zhenhai Fisheries. Meanwhile, his cousin secures a major foreign trade order but recklessly puts to sea without knowing where the fish are, losing everything before blaming Zhenhai. Braving storms and endless obstacles, Lu Zhenhai relies on his genuine fishing expertise to secure a long-term supply agreement. Eventually, he takes over an old factory and leads his fellow veteran fishermen toward a brighter future, earning success and respect through honest hard work.