In Shanghai in the 28th year of the Republic of China, Shen Qingyan, the daughter of the Shen family, fell into a desperate situation due to the mysterious death of her father Shen Jingqian. During the shocking incident in the mourning hall, she discovered that her father's relics contained secrets, but was hunted by Lu Tingyuan's forces, and she even witnessed the betrayal of her brother Shen Shuheng. At a critical moment, old friend Yanqiu appears to save him. The two work together to trace the truth, and are accidentally involved in a game between the revolutionary party, Japanese spies, and traitors. As the investigation deepens, a mysterious organization with marigolds as its symbol emerges. Shen Qingyan gradually uncovers the secrets of his father's past and the Shen family's jade pendant, and uncovers the ghosts within the organization. Finally, he unites with patriotic forces to thwart the Japanese spies' plot to steal cultural relics and destroy the city, transforming from a hothouse daughter into a revolutionary warrior who protects his family and country.
