Technician Chen Yang invests his money and effort to save his brother Zhao Lei's fish farm. But just as the business starts turning a profit, Zhao Lei and his wife shove the original investment in Chen Yang's face to force him out. After taking over, the short-sighted and greedy couple cut wages, refuse to adjust the water quality, and frame Chen Yang, causing disease to break out at the fish farm and orders to be canceled. In the end, the fish die, debts pile up, and the couple turn against each other, losing everything they invested. Meanwhile, Chen Yang makes a comeback through his genuine expertise.