—Clash—tells the story of Min China security police investigating leak cases and dealing with overseas intelligence agents for twenty years.In 1994, tensions between the two sides of the Taiwan Strait were high, and an intelligence report involving missile technology prompted intelligence agencies from both sides to take action one after another.When Wei Guangjin, Director of the Second National Security Division, led Ma Qi and Yin Baoshan to perform tasks in Hong Kong, they received an urgent reminder from Director Wu Shenglai: Jiang Zaizhen, who had contact with them, was in danger.

Jiang Zaizhen is in Taiwan's military intelligence department and has long-term access to important information.She realized she was being monitored and temporarily changed her travel route in an attempt to avoid tracking.Wei Guangjin managed to get close to and protect her, and received three warnings about missile intelligence, latent personnel and internal leak channels of the national security.Afterwards, Jiang Zaizhen was killed during the evacuation, and the clues that had just emerged were interrupted. Wei Guangjin had to re-examine the people around him.

Zhu Yingjia was promoted to deputy director of the Fourth Division and continued to deploy a latent network.He trained Lin Kanshan, who had a business background, as an intelligence agent codenamed “Beifeng”, and allowed him to enter the mainland as a Taiwanese businessman.On the surface, Lin Kanshan participated in attracting investment, visiting relatives, and investing in factories. In fact, he contacted various people through chambers of commerce, dinner parties, and project cooperation, and looked for opportunities to start from the other party's desires, debts, and life difficulties.

Almost at the same time that Lin Kanshan entered Minzhong, young He Chunxiao also entered the national security system.He received training together with Jinlan and Li Huadong to learn confidentiality, deciphering, tracking and investigation.The three people have different personalities and their own methods of doing things.He Chunxiao followed Ma Qi in handling cases. At first, he was accustomed to following the knowledge and procedures mechanically, often exposing his identity at the scene and alerting the target.Ma Qi asked him to remember the people and things he met along the way, and took him to review them again and again, so that he could learn to apply the skills in the book to complex human relationships.

A clue provided by Yang Shiwen led the investigation to a left-handed photographer.Ma Qi and others tracked down the newspaper office, photo studio and postal dormitory, and caught the latent agent Fan Chen. They also discovered from the handover location that the missile technology mastered by the 761 Research Institute may be leaking.At the same time, some young people were attracted by the so-called solicitations and photo remuneration, and took photos of military ports and military compounds for unknown people. They thought they could make quick money, but they unknowingly entered the intelligence trading chain.

Cao Liaoping, an expert from the institute, was targeted by Zhu Yingjia when he was exhibiting in Europe.The other party gradually exerted pressure by using his colleagues' leverage, money, and position failure. Cao Liaoping first hesitated and concealed, and later turned his dissatisfaction with the unit into an excuse to betray secrets.Zhu Yingjia also developed Jia Chunlin. The two lines did not know each other, making it difficult for investigators to see the entire leak network based on the performance of just one person.

Lin Kanshan borrowed a watch to bring the female student Jin Lina to his side.Jin Lina and her boyfriend Lu Zhifei were living in poverty and their debts were getting heavier and heavier. She accepted a secretary job and wanted to get out of trouble with her salary.However, Lu Zhifei went from taking photos to make money to gambling and stealing documents. Jin Lina was also getting deeper and deeper into family relationships, emotions and external threats.Lin Kanshan not only took advantage of them, but was also affected by this relationship. Many seemingly ordinary interactions became clues that the National Security Bureau needed to identify.

After the “Spring Thunder Operation” was launched, the national security focused on investigating and punishing potential operatives.Jinlan lived next door to Lin Kanshan as a travel agency tour guide, and cooperated with He Chunxiao in monitoring. The two had to act out the details of the fake couple's life in a natural way, without disturbing the neighbors or letting Lin Kanshan see the flaws.Waiting for a long time does not always lead to results. A sudden handover, a phone call or a living habit may change the direction of the case.

Cao Liaoping tried to leave via Hong Kong, but Ma Qi led He Chunxiao and Jinlan to pursue him urgently and finally intercepted him.But when one line is broken, new contact information will emerge; internal false information will still flow to the other side, making colleagues in the two offices suspicious of each other.As the investigation continued into the new century, the former masters, apprentices, partners and opponents all changed their situations. He Chunxiao even had to re-investigate his most trusted master.

By 2013, the investigation also involved the land near the military-civilian airport and the Huanyu No. 10 burner technology.Lin Kanshan was ordered to acquire the land, while He Chunxiao continued to pursue the list and technical leak clues returned from the cultural trade forum.After the relevant personnel were arrested one after another, Ma Qi's experience of being ordered to perform secret missions many years ago gradually became clear.He Chunxiao finally understood the misunderstanding his master had endured, and when he went on a mission overseas, he recognized him again in the crowd.

　　When He Chunxiao had his last conversation with Ma Qi, he had already figured out his master's situation over the years.He had been unable to accept Ma Qi as his opponent and suffered from the pain of tracking down his master. Now he realizes that some people are still completing unspeakable tasks despite being called traitors.Ma Qi reminded him that after analyzing the intelligence bought over the years, what is really important is to find out the opponent's long-term plan.

Wei Guang came in to visit Ma Qi, and the conversation between the two revealed the secret: Ma Qi was arranged by Wu Shenglai many years ago to leave his original position and act as an international intelligence dealer. Trading with Taiwan was also part of his mission.Unable to explain to his old colleagues, he could only endure the misunderstanding and continue to fight for opportunities to enter the other party's intelligence system.

Li Qing's hidden identity was discovered by Zhu Yingjia.It turned out that he was an insider of the National Security Bureau who Wu Shenglai had been in contact with for a long time. He had previously used the forum to deliver news, which also left exposed clues.The two sides then exchanged intelligence personnel, Li Qing returned to the mainland, and Lin Kanshan boarded a flight to Taipei.He Chunxiao received a multi-year mission plan from Lin Kanshan.

Jin Lina wore Lin Kanshan's gold watch and watched the fireworks alone in front of the window; Jinlan could not contact her for the time being and could only believe that she had a new place to go.After He Chunxiao and Jinlan completed their mission, they had to face a new separation. Jinlan received an arrangement to go overseas.Later, He Chunxiao was on a mission abroad and recognized Ma Qi from the crowd. Master and apprentice turned back to look at each other and smiled.

Chief Director: Yao Xiaofeng; Screenwriter: Wang Xiaoqiang.Co-directors: Li Ning, Wang Junye.

Starring: Wang Kai, Zhou Yiran, Ou Hao, Peng Yuchang.Special appearances: Cheng Taishen, Qi Huan, Qiu Tian, ​​Wu Qihua, Wu Yue, Yue Yang, Gao Xin, Gao Jie, Zu Feng, Dong Yong.

Produced by: China Central Radio and Television, National Security Film and Television Center of the Ministry of State Security, China TV Drama Production Center Co., Ltd., Shanghai Ningmeng Film and Television Media Co., Ltd.

Production area: Mainland China; Language: Mandarin Chinese; Theme: contemporary national security, suspense.

Filming will start on September 29, 2025, and will be completed on February 1, 2026. The shooting locations include Fuzhou and Pingtan.There are 40 episodes in total, and each episode is about 45 minutes.