The Mystery of the Blue Room (Czech: Záhada modrého pokoje) is a 1933 Czechoslovak mystery film, directed by Miroslav Cikán. It is a remake of the German film Secret of the Blue Room (1932). It stars Karel Haà ¡ler, Frantià ¡ek Kováà ÂÃÂk, and Jaroslav Marvan.
At a country house, to impress his girlfriend a young man volunteers to spend the night in the famous Blue Room where a notorious murder took place many years before. In the morning he has completely vanished.