Ten-year-old Ole is full of mischief. He attempts to fly and is hospitalized with a broken leg. When he sees a Sherlock Holmes movie on TV, however, he forgets about the pains and comes up with a new plan. Disguised as Sherlock Holmes and Dr. Watson, he and his friend Andreas start searching for criminals. Soon, the two boys detect their first case. On the street they meet a man wearing a stuck-on beard. The hobby detectives find this very suspicious and decide to follow him.

Master baker Oskar Lorenz is plagued by a number of worries, because almost every day one of his employees is affected by a different "ailment", making it difficult for the bakery to meet the plan. After all, Lorenz and his team have to ensure that fresh bread rolls and, above all, Berlin country bread can be sold to customers on time every day. And Oskar alone cannot fill all the gaps in the staff. To remedy this situation, Oskar's sister Ilse has come up with something for her brother: a "disease" that is difficult to diagnose. He is now confined to his bed and can no longer fulfill his duties. Ziegler, his deputy, is deeply impressed by the pitiful sight that his otherwise strong master now presents. This seems to be the first ray of hope for Ilse to cure Oskar's coworker and her brother of their "ailments" at the same time.

In the village of Medela, the village elder Fritz Schmal is buried with great sympathy. Beforehand, Till goes with his father to his property to check on the stork on its new nest. When they join the funeral procession afterwards, the stork has just returned from Africa and joins her husband on the nest. So it comes as Grandad Schmal had predicted. The following flashback shows how it all began.

Shortly before the celebration of his 95th birthday, Karl Wolter is murdered. Instead of ending their accidental marriage for good on the long-awaited divorce date, Killmer and Kati Biever take up the investigation. The suspects in their case are rather eccentric: the retarded day laborer with the glass eye, a senile chicken baron and Miss Blücher, a housekeeper with an icy stare and a heavy inheritance. During their investigations, Killmer and Kati soon realize that the crime must have something to do with an inglorious event deep in Monreal's past.

In a backwater town, opera director Andrej Wischnewsky is supposed to put on a production of Mozart's "Don Giovanni".

The doctor has prescribed Herbert plenty of exercise in the fresh air. Hunting is his new hobby. The pride of his wife Margot has a sudden end when it comes out that leisure activity is anything but hunting passion.