The play tells the story of a group of national security officers with superior intelligence and loyalty to the country who discover a series of suspicious incidents in their ordinary daily life, and through superb It is the story of a group of spies finally struck down by the outstanding investigative technology and the loyalty and love for the country and the people. Duan Yingjiu is an excellent investigator of the Xiamen City National Security Bureau. During the investigation of a seemingly ordinary disappearance case, he found some unusual clues. Subsequently, the Xiamen City State Security Bureau established the No. 3 task force, with Duan Yingjiu as the temporary team leader. Duan Yingjiu convened old colleagues such as Dafeng and Lao Wei, as well as newly promoted police officers Huang Hai, Zhu Hui, and Ding Xiaohe to form a team of three generations of national security officers, the old, the middle, and the young. Under the leadership of Duan Yingjiu, the team used their respective professional skills to finally reveal an old case more than ten years ago and successfully brought the spies hiding in Xiamen City to justice. The entire operation was named "Operation Phoenix", which represents the courage and wisdom shown by the national security officers in the process of cracking down on spies