Lu Chen spends 30,000 yuan on an old, battered radio, prompting his wife, Shen Qian, to publicly berate him and demand a divorce. Their neighbors also mock him for wasting money. While dismantling the radio late that night, he unexpectedly discovers a complete set of photonic chip blueprints and an engineering prototype hidden inside its casing. They are the life's work of his late older brother. Lu Chen quickly contacts industry experts and secures an enormous advance payment through a partnership, turning his fortunes around and founding a photonic technology company. He rescues a research team being suppressed by powerful investors and develops proprietary materials that break the overseas technological blockade. At an industry summit, he defeats the monopolistic giants. His ex-wife, who abandoned him, is consumed by regret, while Lu Chen carries on his brother's legacy, using a single beam of light to reshape the global semiconductor landscape.