When Ming Shu finished his training and returned to Dongye City's Bureau of Criminal Investigation, he found himself abruptly reunited with Xiao Yu'an—his old neighbor and childhood friend who disappeared from his life years ago without a word. Not only is Xiao Yu'an suddenly back in Ming Shu's life, he's been instated as Ming Shu's boss. What's more, they suddenly become roommates and start living together as well! At the same time, Ming Shu is faced with a string of baffling murder cases: an unemployed man suddenly goes berserk in a cafe, a band's most diligent member dies under bizarre circumstances, and a mysterious game room seems to host more than games...