one rainy morning, in a small church on the outskirts of the city, it was found that jin min jun, the second year of yingcai high school, was hung on a cross, tortured, and then killed. this technique was used 16 years ago. this happened in the first year after the team leader of an investigation team, team leader zhang, became a policeman, where a chain of serial murders that used these techniques resurfaced, making old criminals nervous.