 Wolfgang Wöller (Fritz Wepper), the popular politician and mayor of the fictitious Lower Bavarian town of Kaltenthal, is afraid of losing support and possible elections due an increase in unemployment.Along with the city council, he falls in love with the idea of bioenergy; determined to put his face and name upon a new, large bioenergy facility that will, hopefully, create economic growth for the town, he needs the support of opposition, who refuse to support the idea as there is no immediate place to put such a facility.Eventually, his eyes fall upon the local cloisters, a large, old castle which houses only six nuns, but swallows up a huge areal portion of the city.