Fisherman Zhou Yuanhang encountered a storm on one of his fishing trips, and a seashell fell onto the bow of his boat, from which a three-year-old girl named Manman appeared. Manman said she could understand the sea and guide the location of fish schools. Zhou Yuanhang took Manman out to try fishing, successfully harvesting over a hundred catties of sea bass and yellow croaker, and then following her guidance to catch wild large yellow croakers in the deep sea trench. The catch was acquired by the county's state-run restaurant, increasing Zhou Yuanhang's income and making him the first ten-thousand-yuan household in the village, welcoming a turning point in his life.