François is a literary scholar and drinker. His relationships with women are limited to one year, his life is sufficiently happy. Until the day when charismatic Muslim politician Mohamed Ben Abbes becomes president in France, introduces patriarchy and polygamy and loses his job. In his growing loneliness, Rector Rediger's offer to resume his teaching at the Sorbonne reaches him on one condition: he must convert to Islam.
Once again, the "border crossing" is celebrated, as every seven years in the Upper Hessian town of Bergen. It is really turbulent at this folk festival, when the municipal boundaries are confirmed from old tradition and everything is upside down. For this occasion leaves Thomas Weidmann his girlfriend and flees because of his botched university career from the city of Berlin back to his native village. At the party, he meets Kerstin Werner, whose life has just come out of joint - her marriage is broken and her husband Jürgen on the jump to another, younger woman.
