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★The 20th annual "This mystery novel is great!" Grand Prize! The breakout work of Bengal reasoning that amazed the Japanese literary world
★5 Secret Rooms X15 Secret rooms classification X1 a hidden surprise, you can think of secret room tricks, are here!
★Top 10 of the total list of Japanese Amazon literary novels, 4 overprints! Dangdang has (China book website) 6000 reviews and recommendations!

Three years ago, a man was murdered in a locked room. The suspect was quickly locked down and the evidence was solid, but because the scene was a perfect secret room, no one could crack, the suspect was eventually acquitted. Since then, in Japan, where innocence is guaranteed as long as the scene is a secret room, the number of secret room killings has increased rapidly.

The famous mystery writer left behind the hotel "White House" a secret room killing incident occurred, at the same time, a bridge leading to the hotel was destroyed, and 12 people were trapped in the hotel. In the absence of help, crimes like toppled dominoes, one after another.

Room! Room! Room! Room! Room! Room! Room! The strange numbers of playing cards left next to the body are constantly updated, and who will be the next victim?

kamosakikamo
Born in Ube, Yamaguchi Prefecture in 1985, he graduated from the Faculty of Science and Technology of Tokyo University of Science and Technology. With his debut work "Homicides in the Golden Age of the Chamber of Secrets" won the 20th "This mystery novel is great!" The Library Prize.