This is an inspiring ancient-era farming story about discrimination and people's livelihoods. Jiang Wanyu, a postgraduate student in aquatic science, transmigrates into the daughter of a disgraced Dan household. Her entire family is exiled to Pinghu, where they endure relentless oppression from officials and the powerful. Using modern aquaculture technology, she establishes herself in the waters, cultivates pearls, and builds a thriving business. She joins forces with fellow Dan households from the lowest social ranks to establish the Fishing Lights Cooperative. Facing corrupt officials and excessive taxes, malicious competition from unscrupulous merchants, and ruthless framing by the chief minister's family, she remains true to herself and gathers evidence. Through careful planning, she exposes the Yan family's heinous crimes of embezzling imperial tribute and framing loyal officials. Ultimately, she clears her family's name, takes charge of pearl procurement in Pinghu, and establishes a school for Dan households, enabling generations of people once despised as waterborne commoners to live and work in peace as fishing lights continue to shine across Pinghu.