Strange things are happening at the Schönbuch Hotel. During a security check of the hotel staff, the identity of the concierge of the house turned out to be false. To top it all off, there is a big international physics conference in the house this week. Who is this concierge? What is he planning? And is there a connection between him and the great discovery that is supposed to be presented by Prof. Dr. Dr. Hürz?
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