The frozen corpse of a young apprentice monk is found near Kirara Hill in Rakuhoku. Detective Hayakawa from the Kyoto Prefectural Police grows suspicious of the fact that someone froze to death in the middle of summer and visits his nephew Saburo, who works at a cryogenics research institute. Shortly after, the frozen body of Saburo’s father, Takayoshi, is also discovered. Recently, Takayoshi had been closely involved with a designer named Saori.