In Shanghai in 1938, {Su Manqing} used the identity of a newspaper reporter as a cover to lurk in the Wang Puppet Intelligence Service, just to avenge the tragic death of his family. However, internal strife broke out in her underground team due to interest disputes, secrets were leaked, and comrades died one after another.
At a critical moment, she discovered that Lu Chenzhou, the head of the Intelligence Department, who had been tit for tat with her, was actually an "undercover" lurking deeper. The two went from being suspicious of each other to fighting side by side, but they fell into a desperate situation during the mission - the team was surrounded and the retreat was blocked. In despair, Lu Chenzhou broke out to protect her, exposed his identity and died with the enemy.
Su Manqing continued to lurk with his last wish, but later discovered that the truth behind the tragic death of her family was actually related to the "faith" she was sworn to protect, and there was a heavier secret hidden behind Lu Chenzhou's "repayment".
