In the summer of 1995, in San Francisco's Chinatown, 18-year-old Chinese-American girl Luna Chen bravely rescued a mixed-race child who accidentally fell into the koi pond in the Chinese community on the early morning of her SAT exam day. This scene was captured by a cross-cultural documentary team from the local public television station. Thanks to the on-site testimony of the reporters, Luna, who was soaked to the skin and nearly missed the exam, was allowed to enter the examination room. In the exam room, Ethan Wong, a Chinese-American rich second-generation who was both her rival and had a secret crush on her, quietly lent her a helping hand. After the exam, the TV station invited both of them to participate in the filming of the documentary Chinatown Roots. Luna not only earned her first pot of gold in life — a $5,000 bonus, but also grew increasingly fond of Ethan during their daily interactions. The two were admitted to the University of California, Berkeley together, but Ethan was forced to cut off contact and move to New York due to a crisis in his family's international trade. Five years later, to deal with her elders' urging to get married, Luna signed a contract marriage agreement with a gentle white lawyer. However, she reunited with Ethan, who had been missing for five years, in the elevator of the law firm. By this time, he had transformed from a rebellious teenager into a calm and decisive CEO of a multinational enterprise. Faced with Luna's "marriage contract," Ethan's eyes darkened, and he directly interrupted the signing, saying, "A contract marriage? I’m a far better fit."