Cheng Wanzhao returned to China from England, only to receive the sad news that his brother Cheng Che had died unexpectedly. She gave up her career and returned to teach at the dilapidated rural school where her brother had taught before, and received a "blank suicide note" from her brother. In order to raise funds for the school, she transformed into a red card dancer at Paramount at night; Wen Yuan, who looked like an ordinary doctor, was actually an underground party member and Cheng Che's comrade, but he didn't know at first that she was the martyr sister the organization wanted to protect. Under the arrangement of the underground organization and the proprietress of Paramount, the two unexpectedly got married and began a married life in which each had their own secrets. Cheng Wanzhao, who teaches during the day and dances at night, is constantly in crisis. Wen Yuan secretly rescues him many times. The two test each other and gradually get closer. As they fought side by side through life and death again and again, Cheng Wanzhao discovered Wen Yuan's true identity, and Wen Yuan finally learned that she was the person entrusted to her by her comrades. The enemy is approaching step by step, and the dual identities of Paramount and Huichuntang are at stake. The two work hand in hand, using the double cover of the dancer and the doctor to expose the conspiracy. In the end, the enemy was liquidated, the school was saved, and Huichun Hall became the new underground contact point. In the tempering of faith and troubled times, the two went from a fake couple to true love, and they also inherited Cheng Che's unfinished mission.
