Shen Qingxian, a 24-year-old Peking Opera dancer, went south to Shanghai with his unique skills. Under the cover of his identity as a famous actor in Mingchun Society, he became an intelligence agent of the underground party "Nightingale". She turned the lyrics of the opera into secret codes, used facial makeup to deliver secret reports, and dealt with the triple encirclement and suppression by the Japanese army's special high school, Wang puppet traitors and military reunification agents. The stage is her battlefield. She hides a sharp knife in her sleeves and conveys information through her singing. She outsmarts powerful enemies and slaps Xiaoxiao in the face on a small stage. Faced with the choice between family and faith, and the collision between camp and humanity, this famous actress in troubled times shouldered the righteousness of her family and country with her weak body, opened the road to dawn in the bloody fog, and wrote the passionate legend of the lurker with a Liyuan song.
