Urs Gipser, the Minister of Defence, reads the message and immediately ends his hike. He rushes to the Turrenhuis, in front of which a helicopter is landing.

What is happening right now? Is Switzerland being attacked by a foreign power? Politicians, the media and the civilian intelligence service assume an Islamist attack.

Colonel König from the military intelligence service and his Dutch friend Hendrik, known from "STEINGLETSCHER", follow their own trail. But then the suspected perpetrators are kidnapped