The story takes place in Xinlin City, a city full of technology and tradition. Five detectives with different personalities work together to solve six major suspense cases. Each case contains twists and turns and bizarre clues, unexpected humor and exploration of human nature. As more mysteries emerge, the shocking secrets hidden under the city gradually reveal themselves: It turns out that all the cases point to a conspiracy that affects the entire city. The detectives uncovered the truth while laughing and chatting, harvesting growth and friendship, and finally ushered in the magnificent final reveal.