National Day at ten o'clock

Based on Lu Shiwendas novel "Double Bell Horse Hoof Watch" adaptation, before the National Day, a group of Young Pioneers picked up an anonymous letter at the entrance of a provincial capital's communication office in the northwestern region. The recipients were Zhang Dali and Ping Xiaohai. After deliberation, the Public Security Bureau decided to assign investigators Gu Qun and Xiao Yu to carry out the investigation. 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 Dali was also an honest and kind person. It was further revealed that the anonymous letter was written by Bai Songting, a driver who had been dismissed from the Culture Bureau. Despite being falsely accused, Ping Xiaohai was determined to find the culprit. One day, he noticed He Zhanbiao, another driver from the Culture Bureau, hiding behind a tree and watching Bai Songting from a distance. As Bai Songting was about to leave, Ping Xiaohai decided to tail He Zhanbiao. However, he was discovered. When He drove to a secluded place and claimed there was something wrong with the car, he asked Ping Xiaohai to help check it. While checking, He took advantage of Ping Xiaohai's distraction and stabbed him with a sharp knife. A fierce fight ensued between the two. On the morning of National Day, when He Zhanbiao and Bai Songting met at the station, they were arrested by the public security officers.