In the modern fishing village of Zhoushan, Lin Xiao inherited his father's fishing boat, but faced a decrease in catches caused by "overfishing". She refused illegal fishing and tried "ecological farming", but was questioned by the old fishermen in the village and threatened by illegal fishing gangs. Marine environmental protection engineer Chen Mo came to the fishing village to investigate, helped Lin Xiao design an ecological breeding plan, and also helped her collect evidence of illegal fishing. The two fell in love with each other while guarding the blue sea. In the end, they not only improved the catch, but also promoted the development of the fishing village "fishing and tourism integration", giving their hometown a new lease of life.