On a colleague, Professor Kita's, suggestion, Associate Professor Saikawa Souhei and his student Nishinosono Moe head to Kita's research institute, where various experiments are being conducted in a low-temperature research lab.

During the night a murder takes place: two graduate students are found dead in the lab.

How did the killer enter the locked room? How did they leave?

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Staff

• Hiroshi Mori — Story
• Torao Asada — Art