Episode 1

In the late 1920s, Cai Zejun, who was born in Wangmen, Ningde, was arranged by his family to get married. His mother Lin Ying promised that as long as he was willing to marry Xue Pinxuan first, he could go out to study.However, on the night of their wedding, Cai Zechuo left alone without saying goodbye, leaving a letter to his wife Xue Pinxuan confessing his ambitions. If she was also dissatisfied with the feudal marriage, she could divorce and regain her freedom at any time.

Later, Cai Zejuan came to Ningbo No. 4 Middle School and listened to Mr. Changshan’s lecture. It was as if a lamp was lit in his heart, allowing him to see clearly the entire dark and troubled world and find the way forward.It was under the guidance of this revolutionary pioneer that Cai Zechuo aroused his passionate patriotism, actively participated in the progressive movement, worked hard to seek liberation and equality across the country, and resolutely joined the Communist Party of China.

In 1927, the Kuomintang launched the April 12 counter-revolutionary coup, arbitrarily arrested Communist Party members and suppressed the proletarian revolutionary movement. A large number of students, workers and progressives were arrested and imprisoned. The revolutionary cause suffered an unprecedented and severe blow, andAs a result, Cai Zejuan was arrested and sent to Fuzhou Prison while performing his mission.

After Xue Pinxuan learned about it, she immediately contacted her uncle Lin Chenhan. Because his uncle had a relationship with the warden and both worked for the Kuomintang, he hurriedly relied on connections and spent thousands of dollars to finally rescue his nephew Cai Zechuan.The moment he left the prison, Cai Zejiu met his wife Xue Pinxuan and his uncle Lin Chenhan. When he returned home, he felt even more ashamed of his mother.

Over the years, Xue Pinxuan has read the books that Cai Zejuo left in the study, telling him that she never regretted marrying him.Similarly, Cai Zejiu understood Xue Pinxuan's intentions, and the two embraced each other affectionately and became a real couple.But not long after, a code word published in the newspaper made Cai Zedang worried. Xue Pinxuan understood Cai Zejuan's thoughts well and encouraged him to continue pursuing his ideals.

In the end, Cai Zejuan returned to Shanghai and tried to contact the organization and his superior, Mr. Changshan. However, he failed, so he had to continue his studies and transferred to Tongji University under the arrangement of Lin Chenhan.At this moment, Shanghai became extremely tense under the shroud of white. Cai Zeqiao found out through the newspaper that Mr. Changshan was arrested and sacrificed, and he was deeply shocked.

Cai Zejuan came to Tongji University to register and saw his former teacher Su Qingwu. His mathematical talent attracted the attention of Huang Jibi, a senior official of the Kuomintang.On the other side, Ming Song from Zhonggong Special Branch took the initiative to contact Xia Tian, ​​the head of the Shanghai underground party organization, and conveyed to him the organization's request to open a radio training class as soon as possible. He would implement the specific time and place, and select trustworthy people to serve as guards for the training class.Security work.

In the afternoon, Cai Zejiu saw Teacher Su Qingwu and Xia Tian standing downstairs chatting, and suddenly remembered that he had met Xia Tian once.That night, Lin Chenhan angrily accused Cai Zejuan of still reading dangerous publications, and reminded him not to contact the Communist Party organizations anymore, and was even more worried that he had joined the Communist Party. In order to reassure his uncle, Cai Zejuan bluntly said that he had joined a progressive organization before, and originally wanted to find a long gown.Sir, how did you know that Mr. Changshan had died.Lin Chenhan breathed a sigh of relief and hoped that Cai Zejue would never go astray and think about his family in everything he did. Cai Zejuan unexpectedly learned that his wife Xue Pinxuan had given birth to a child and was very happy for it.

After Tao Ge listened to Huang Jibi's lecture, he resolutely applied to join his research group, and Cai Zechuan also developed a strong interest in mathematics.The next morning, Cai Zejuan found that a man who often sold newspapers posted a notice for %Amateur Radio Training Class Recruiting Students. He guessed that it must be related to the party organization, so he went to register under the pseudonym Cai Wei, and happened to be bumped into by Xia Tian.

After this incident, Xia Tian suspected Cai Zejuan's identity and informed Su Qingwu to find an opportunity to find out Cai Zejuan's identity.Su Qingwu asked Cai Zedang to meet him at his old house on the grounds that he needed Cai Zedang's help. He used Colonel Chapel to test and confirm Cai Zedang's identity as a Communist Party member.Xia Tian has found out that Cai Zeju is a Communist, but cannot be sure whether he is a traitor. Cai Zeju's sincere words completely moved Xia Tian and Su Qingwu, and officially returned to the ranks of the Communist Party.