Rong Jinyu, who studied in Paris, returned to China with modern design concepts and wanted to revive the family silk shop; her dress was splashed by Yi Mingxuan's car at the pier, and the two had their first confrontation but did not know each other's identity; Rong Jinyu discovered that the person her father had engaged to be engaged to in the early years was Yi Mingxuan, but the other party knew nothing about it. She knew that she already had another admirer; she decided to conceal her identity and get close to Yi Mingxuan, but found a batch of suspicious arms in the warehouse of the silk store; Yi Mingxuan appeared to be running a foreign business, secretly transporting supplies for the revolutionary party, but his true identity was a hidden agent of the military command; Rong Jinyu was involved in a spy war, and she used cheongsam designs In order to cover and assist in delivering intelligence; Japanese spies traced the material line, Rong Jinyu's brother Rong Jinchen defected to the Wang Puppet regime for profit, and the brother and sister separated; Yi Mingxuan set up a trap to lure the snake out of the hole, but Rong Jinyu was kidnapped and tortured to the point of death; Yi Mingxuan exposed his identity to save her and was forced to evacuate Shanghai; three years later Shanghai fell, and Rong Jinyu found the underground contact station with half a map. When they met again, Yi Mingxuan had completely changed his face; in the final mission, the two faced betrayal by traitors and Japanese encirclement and suppression, and used their lives to fulfill their promise in the spring breeze; all love and hate turned into a gunshot and catkins flying all over the city in the tragic song of homeland.
