National Day at ten o'clock

Based on Lu Shiwendao's novel "Double Bell Horseshoe Watch" adaptation, before National Day, at the entrance of a provincial capital's reception office in the northwestern region, a group of Young Pioneers picked up an anonymous letter. The recipients were Zhang Dalì and Ping Xiaohai. After deliberation, the Public Security Bureau decided to assign investigators Gu Qun and Xiao Yu to look into it. Upon investigation, it was found that Ping Xiaohai was a car driver for the Culture Bureau, known for his enthusiasm and positive work attitude. Zhang Dalì was also an honest and kind person. It was further discovered that the anonymous letter was written by Bai Songting, a driver who had been expelled from the Culture Bureau. Despite being unjustly accused, Ping Xiaohai was determined to find the culprits. One day, he noticed He Zhanbiao, another driver from the Culture Bureau, hiding behind a tree and keeping a close eye on Bai Songting in the distance. As Bai Songting was about to leave, Ping Xiaohai decided to tail He Zhanbiao. Unexpectedly, he was detected. When He drove to a secluded place and claimed there was something wrong with the car, asking Ping Xiaohai to help check it, He took advantage of the moment and stabbed Ping Xiaohai with a sharp knife while he wasn't paying attention. A fierce fight broke out between the two. On the morning of National Day, when He Zhanbiao and Bai Songting met at the train station, they were arrested by the public security officers.