Mayor Wöller is compelled to do 100 hours of community service. He passes his penalty at the convent, where he accidentally finds a forgotten cave with ancient cave paintings. Why not making money out of his discovery through tourism? But therefore the community has to buy the convent. Chances are not too bad as the financial situation of the order is a disaster. Sister Hanna and her fellow sisters are fighting to save their Convent Kaltenthal by all available means.