The Swiss population decides that there should only be one national language in the future. During the transition to monolingualism, federal policeman Walter Egli and his colleague have to deal with a group of opponents.

A crazy referendum throws Switzerland into a state of emergency. By the acceptance of the initiative "No Bilangue" there should be from now on only one national language: French. Many German-speaking Swiss are therefore having a crisis. Including fifty-six-year-old Walter Egli, who works for the Federal Police and must ensure that the transition to monolingualism is carried out properly. Although he hardly speaks any French himself, he is sent to Ticino with a French-speaking partner to uncover a Ticino resistance group that is fighting the new law by all means necessary.