An anonymous letter is delivered to the Tokyo Metropolitan Police Department. The letter states that a criminal of a murder case will appear at the countdown party Masquerade Night that will be held at Hotel Cortesia Tokyo. Detective Kosuke Nitta must go undercover and work again at the Hotel Cortesia Tokyo. There, he meets Naomi Yamagishi, who works as a concierge. Without any information about the criminal, except that the person will be in attendance, Detective Kosuke Nitta works feverishly to find the criminal among the 500 attendees.
as Kosuke Nitta
as Naomi Yamagishi
as Kazuhiko Nose
as Machiko Sono
as Midori Nakane
as Atsuya Kusakabe
as Yusaku Ujihara
as Mayumi Okuda
as Yuri Kaizuka
as Masaharu Motomiya
as Masaaki Sono
as Mikio Urabe
as Kumiko Akiyama
as Shinjiro Ozaki
as Mika Kawamoto
as Taeko Kano
as Yasushi Fujiki
as Tatsuo Inagaki
