The four friends - Ina, Tim, Sarah and Niko - are on vacation. They go to Munich to see Aunt Monika and Uncle Paul. You can see from a tower of the Frauenkirche to the Alps, go to a beer garden and visit many great things in the Deutsches Museum. But they want to experience adventure again! You can lock yourself up in the Deutsches Museum at night. They crawl through the tunnels of the mine in the museum. But then they have to save a violin that is worth two million euros. And suddenly they are in great danger ...
