A man and a woman who are looking for Marguerite, pretend to come from the future. The woman claims to be a great-granddaughter of Marguerite and wants to kill her. She wants to prevent Marguerite from spreading a deadly epidemic. Marguerite would get infected with the virus in the plateau's escape tunnel. The man wants the opposite: He would like to see Marguerite spread the virus, so that he can then find a cure which would make him rich and famous.

I promise that I didn't make up that plotline myself. This is just my usual translation of the German text from the TV-Stations website. Sounds confusing? Sounds fabricated? You bet. The only really interesting information is that there definitely seems to be an escape tunnel somewhere on the plateau.