Returning youth Chen Yan goes back to his hometown to lease a neglected crab pond, turning the barren pond into a high-quality breeding base relying on scientific aquaculture technology. Incited by illegal merchants, the villagers break the contract midway to take back the pond mouth. Blindly following the trend in aquaculture, they encounter typhoons and diseases, facing a huge breach of contract crisis. In times of crisis, Chen Yan puts aside past estrangements, returns to lead the entire village to rebuild the industry, promotes standardized transparent systems, develops crab-rice symbiosis and rural cultural tourism, practices youth responsibility with practical actions, and assists in rural common prosperity.