Shen Jinzhen's true identity is a member of the underground party.

Due to the betrayal of the traitor Gu Lun, many underground party members were arrested. In order to rescue the betrayed comrades, Shen Jinzhen fought bloody battles with the police. Shen Jinzhen was accidentally injured. She hurriedly changed into her night clothes and blended into the crowd. She and Wei Ruolai calledShen Jin was really worried that the spies would catch up with him, so he pulled Wei Ruolai into the car without further explanation, pretending to be a couple going to the theater and left quickly.

Wei Ruolai saw the blood on Shen Jinzhen's leg and helped Shen Jinzhen through the crisis out of kindness.Shen Jinzhen came to the traffic station to meet the stationmaster Xu Nuo. Xu Nuo helped her bandage the wound. Shen Jinzhen asked Xu Nuo to move other comrades as soon as possible to prevent them from being shot.It turns out that Shen Jinzhen's true identity is a member of the underground party.