“P, Please. You know how important this case is to S” 'S' lost one and only family in a button murder case. There was only one reason she became a detective, to solve that case. Investigate the crime scene with S and arrest the criminal! Find the evidence in the crime scene that differences in the scenes, and try to guess the criminal with the information you have acquired! “Detective S,” the guessing game using Find the Differences Escape from the cliché! ※SYNOPSIS S became a detective to avenge his father "R". He was a police killed by a serial killer 10 years ago. In the end, neither could the police uncover the case. "S" feels the incompetence of the police. S became a famous detective later, and while she was investigating on a case, she discovers a “wooden button” with a snake carved on it that looked like what was found in R's belongings. S hears unexpected news while investigating on a case centered on the “wooden button,” a clue that she discovered in f...