The Hidden Net tells the story of Luo Xian, the daughter of a law professor at a certain university. While studying at the sports academy, she falls in love with soccer player Chen Zhiping. They share common ideals and can support each other in their careers. However, just before graduation, when Luo Xian invites Chen Zhiping to meet her parents, she encounters strong opposition from Mr. and Mrs. Luo Zhongwen. They look down on Chen Zhiping's poor family background and also do not value the sport of football, so they strongly oppose the union of these young people and want to marry Luo Xian to He Kan, the son of a university leader and an old friend of theirs. He Kan is the chief mate of an ocean-going ship. Luo Xian grew up with He Kan, and while He Kan likes Luo Xian, friendship does not equate to love, and Luo Xian does not love He Kan. Although Chen Zhiping's parents are workers, they also hold outdated views about social class and do not approve of his relationship with Luo Xian. They insist that Chen Zhiping marries Ahui, a female worker from the same background as them. Under the pressure of outdated secular ideas, Chen Zhiping is forced to marry Ahui. However, Luo Xian does not submit to her parents' arrangements; she leaves home. In extreme pain and difficulty, she marries Guo Fen, a worker at a shipyard. A marriage without love is unhappy, and the two lack common language in their married life. Guo Fen dies in a work-related accident, bringing new trauma to Luo Xian's heart. She carries on living with her daughter Beibei, channeling her passion for life into her career. The devoted He Kan has always loved Luo Xian. When he learns that Luo Xian and Chen Zhiping are in love, he supports their love. After Guo Fen's death, He Kan feels deep sympathy for Luo Xian and decisively wants to marry her. But at this time, He Fangde and Luo Zhongwen once again oppose their union because Luo Xian is now a widow with a child. Feudal consciousness acts like a hidden net, influencing a generation of youth. He Kan bravely resists the constraints of old traditional notions and goes to find Luo Xian with hope. After enduring various hardships, Luo Xian does not agree to He Kan's proposal. She decides to first make a new contribution and creation in her career.