With her charming, unconventional manner, Sister Anna Seelenbiner is one of the most popular sisters of the Protestant Diakonissenanstalt in Upper Franconia. With a healthy mixture of humor and sensitivity, she takes on the needs and worries of her fellow human beings. Her superior, Gundula Schwertfeger, is anything but enthusiastic about Anna's free-spirited way of working: In order to teach the rebellious sister humility and obedience, she is forced to deal only with financial matters in the future. Anna's first assignment takes her to a village near Munich to sell an inn which was bequeathed to the Diakonie, but when she gets there she's shocked and puzzled to discover that the "Weißblauer Engel" restaurant is a brothel. After the initial shock, it doesn't take long for Anna to get to know and understand the likeable host Kristos and his three good-humored "angels": Madonna, Xana, and Aurora. She learns from them that an unscrupulous building contractor named Breitmoser wants to buy not only the "Weißblauer Engel" but the entire village in order to build a gigantic tasteless football amusement park on the site. Anna's fighting spirit is awakened. Together with Kristos, the "angels," and a small group of undaunted villagers, she stands in the way of Breitmoser's construction crew--and makes headlines. Superiour Gundula shows up in the village later and Breitmoser has an easy time with her: a few gentle compliments and the superior assures him that the hotel will be sold. In this tricky situation, there is only one chance to find another buyer. The spirited sister gets help from her old friend, the Catholic prelate Schwanthaler, whom she already knew from student days--who owes her a debt.