*The Locked Room Murder in the Golden Age* by Kamo Nozomu, Beijing Daily Press

Three years ago, a man was murdered in a locked room. The suspect was quickly identified and the evidence was conclusive, but because the crime scene was a perfect locked room that no one could unravel, the suspect was ultimately acquitted. Since then, in Japan, where a locked-room crime scene guarantees acquittal, locked-room murders have surged.

A locked-room murder occurs at the "Snow White Inn," a hotel left behind by a famous mystery writer. At the same time, the only bridge leading to the hotel is destroyed, trapping twelve people inside. In this isolated situation, crimes occur like falling dominoes, one after another.

Locked room, locked room, locked room, all the crime scenes are locked rooms! The strange playing card numbers left beside the bodies keep updating. Who will be the next victim?