With a heatwave warning looming, Chen Lei ignores his fiancée Wen Yao's objections and uses the entire 300,000 yuan saved for their wedding home to buy three generators, putting the deposit on a new shop on hold. Wen Yao leaves in anger, while fellow seafood merchant Hao Gang mocks him for imagining things. When a massive citywide blackout strikes, Hao Gang's 20,000 jin of shrimp suffocate and die because he has no backup equipment, leaving him 240,000 yuan in debt and on the verge of closing his business. Chen Lei uses his generators to keep his shrimp alive, refuses to raise prices, and builds steel-cage protection for his equipment. He even guarantees a loan to help Hao Gang cut his losses, then leads the formation of a seafood merchants' alliance with strict rules for honest business. Together, the merchants on the entire street pursue shared success and build a sustainable path to prosperity.