After Ming Shu finished his training and returned to Dongye City’s Criminal Investigation Bureau, he found that Xiao Yu'an, his old neighbor who was like a big brother to him that left without saying goodbye many years ago, had suddenly become his immediate superior. What was crazier was that they also became housemates and started living together! While Ming Shu juggled that headache of a situation, mysterious murder cases followed one after another - an unemployed man suddenly going crazy in a book cafe, the most hardworking performer of a Chinese orchestra dying strangely, an escape room game that seemed to be more than a game... Ming Shu, ‘This time, I won’t let you go.’