Kindhearted and dutiful Su Wanning is forced to marry in place of her older sister, who has broken off the engagement, and becomes the wife of Lu Tianhe, a low-key, hardworking aquaculture farmer. After marriage, the two work together in harmony, diligently developing their aquaculture business. When an illegal pig farm pollutes the water supply, Lu Tianhe leads the villagers in defending their rights through legal means and protecting the rural environment. Su Wanning's younger sister returns after completing her studies and introduces high-quality new aquatic species, boosting the local industry. The villagers abandon their obsession with vanity and status, relying on their own hard work to build their hometown and embodying ordinary people's dedication to building a beautiful countryside and serving their country.