More than ten years have passed since the stories told in the crime scene TV series. Over the past ten years, the Dianhai Branch of the Beijing Public Security Bureau has undergone earth-shaking changes. Some of the former gang members have retired, some have been transferred elsewhere, and some have quietly gone to distant places for the happiness of their loved ones, and have never been heard from again. There are always new people reporting every year, injecting fresh blood into the police station. After more than ten years of growing up together, the remaining comrades have made great achievements in their careers. At the same time, those hidden CPs finally got married after a series of emotional entanglements. Others have also found their only one among the newcomers in the police station and people from other industries. However, since as police officers, they are destined to live an ordinary life, so what kind of major case will they face this time?