Anton De Verdier (Dr. Martin Bulwer)Else Frölich (Mary)Oscar Nielsen (Police Constable)Carl SchenstrømRobert Schmidt (Tom Jackson)Charles Willumsen (Shannon)
At the upscale Windsor Hotel, a couple take in room no. 17. After a while, someone calls from the room for service, but when the staff arrives, the door is locked and no one opens. The porter calls the police as he thinks that something serious has taken place inside.