After returning from Hong Kong, Sister Zheng (played by Cheng Yuling) was highly recognized by her superiors for her work performance. She was promoted to a higher position and was responsible for training police officers with her assistant Asheng (played by Zhang Jianting), who has special abilities. On the other hand, Uncle Wu and his nephew Axiong (played by Li Zixiong), a Hong Kong police officer, came to the mainland to visit relatives. Axiong encountered a homicide case in the hotel where he stayed and was forced to stay by Sister Zheng who came to investigate the case. Uncle Wu, who was busy looking for Taiwanese spies, met a group of scammers. Axiong, who was left behind, stayed at Sister Zheng's house for witness protection. Sister Zheng, who had a good impression of Wu Weiguo, also had a secret crush on Axiong, but could not interact with him normally because of face. Soon, Axiong returned to Hong Kong. Sister Zheng followed the instructions of her superiors and took her assistants Asheng, Ahu and Axiong to Hong Kong to investigate the case, causing a lot of trouble. She stumbled towards the goal of arresting criminals...