Returning engineer Lin Xi takes over the pipe network renovation of Liuhe Village, facing villagers' doubts over the quotation. Gao Fucheng of the same village seizes the project with a low price, fooling everyone with shoddy pipe materials. On one side, Shiling Village strictly observes norms for smooth water supply; on the other side, Liuhe Village suffers a pipe burst incident. A drinking water project controversy reflects the game between human feelings and rules, exposing the heavy price of pursuing only low prices.