The twenty-eighth Meitantei Conan movie. An old friend of Mouri Kogoro reopens an investigation of the incident that caused the scars on Inspector Yamato's face. This time not only Nagano's police involved, but Tokyo MPD, CSICE and PSB are involved not forgetting of course Edogawa Conan, the detective boys and the sleeping detective, in a plot full of assassination attempts. In the cold winter of Nagano, Conan has the job of finding the truth behind the incident 10 months ago, that lead to Yamato's face injury, as well as the murder and murders attempts that followed. For that he will count with the precious help of the Nagano police team, Mouri's shooting skills and the PSB knowledge.