Masquerade Hotel is Keigo Higashino's third work in the 25th anniversary of his writing career. Brand-new character setting and emotional design have pushed his personal creation to a new peak. This is also the latest work introduced to China on 20 12. The story begins with the password sequence left over from the scene of three consecutive murders in Tokyo. By analyzing the signals of these three incidents, the search headquarters concluded that the fourth murder would take place in the "Cotesia Hotel in Tokyo". In order to prevent the fourth incident, several searchers were arranged in the hotel to search as waiters. One of the searchers is Hirosuke Xintian, a criminal police officer who searched the first division. Through him, Keigo Higashino presents the growth process of a mortal and the subtle psychological changes between people from mutual vigilance to positive understanding.