Description：Deng Xiaolong (played by Xu Guanying) has been upright and helpful since he was a child. His wish is to become a good policeman who fights violence and protects the people when he grows up. Unfortunately, fate makes him play tricks on him. Because of his short stature and natural color blindness, he was rejected by the police station, so he had to go to the security company to be a guard. Security supervisor Zhou Shichang (played by Xu Guanwen) is an old oil stick, sarcastic, greedy and afraid of death. His subordinate Sam (played by Xu Guanjie) has disliked him for a long time, but he has no place to appeal. This time, the company's prince Wang Pingfan returned from studying abroad and pretended to be a security guard to sneak into the company to investigate the situation. Soon Sam and Xiaolong were promoted for their outstanding work, but Zhou Shichang was deprived of his position as supervisor and demoted. He will be able to retire and enjoy his pension in a few months. Will he endure this bad breath for the sake of his pension or will he do something else?