A young man who has not been deeply involved in the world, is strict in introspection and kind-hearted. After graduating from college, he entered a special training class for cadres of Fuxing Society. Because of his extraordinary observation ability and tenacious will quality, he was selected by Chen Moqun, the special stationmaster of Shanghai Fuxing Society, and entered the special service Shanghai area to become a new agent.

Under the influence of Gu, Ji Zhongyuan, Zuo Qiuming and other producers of party member, he gradually grew into a firm producer of party member and made outstanding contributions to the party and the country.

2. Zhu Yizhen

A progressive young man with revolutionary ideas is also an underground party member. In order to realize her dream, she gave up her rich life and went to Shanghai, Hong Kong, the southern Zhejiang base of the New Fourth Army and other places to join the underground revolution. In this process, she met Lin Nansheng who was in the military system many times. Because she didn't understand the change of the other party's identity, she struggled on the edge of reason and emotion.

3. Ancient Shen Yan

A * * * producer lurking in the secret service of the Kuomintang Fuxing Society in Shanghai, code-named "postman". As the director of Shanghai Archives with a loose style, Gu has repeatedly escaped the raids of Lin Nansheng and Chen Moqun on the "postman".

4. Chen Moqun

The stationmaster of the Secret Service of Fuxing Society of Shanghai Kuomintang brought Lin Nansheng into the intelligence department Bole. Chen Moqun is suspicious and ungrateful. He doesn't trust anyone but himself. As long as he can achieve his goal, he can use anyone.

5. Lan Xinjie

Lan Xinjie, the top dancer in Shanghai Song and Dance Hall, has always adhered to the righteousness of her home country and her own bottom line, although she wandered among various forces in order to survive. After leaving the ballroom, she wanted to concentrate on her own life, but she experienced the pain of losing her husband and children one after another.

Lan Xinjie and Lin Nansheng helped and redeemed each other in the constant reunion, and gradually developed feelings beyond friendship, love and affection, so that Lan Xinjie finally gave his life.