Young Shen Hao is targeted by his clan and allotted an abandoned water pit that everyone in the village avoids. With his mother seriously ill and desperately needing money for medicine, he finds himself at the end of his rope. With the help of his loyal dog, Dahei, he unexpectedly discovers a rare selenium-rich cold spring and wild aquatic life hidden at the bottom of the pit. Seizing this opportunity, Shen Hao develops an ecological aquaculture business. With determination and ingenuity, he overcomes one obstacle after another, repays the kindness he has received by helping his neighbors, and eventually builds a large-scale cold-spring ecological park. Together with his mother and loyal dog, he completely transforms their fate and carves out a path to prosperity through rural development.