After a life-threatening operation, Hubert and Girwidz try to clear their minds on a mountain hike. At boundary marker 147, they come across two bodies — one on the German side and the other on the Austrian side.

Single mother Ulla is constantly worried about the well-being and safety of her teenage daughter Julia. Her father is much more carefree and has even bought her tickets to a concert in Italy. Ulla doesn't want her daughter to go alone with her best friend, but Julia ignores her mother's wishes and drives south without her permission. When they find out that the concert was only excuse to meet a boy she met on the internet, they set their differences aside and travel to Italy to find their daughter.

During the Christmas holidays, Hubert and Staller investigate the demise of an elderly pensioner who died suspiciously but unnoticed a year earlier.

In the third part of the story about Dr. Sophie Schöner and Dr. Wu, Professor Fritz collapses during an operation - the staff puzzles over the cause. The clinic management seizes the opportunity to get rid of the 60-year-old. Dr. Wu takes over the post, even though he was seeking to work with Sophie in his own practice. And that causes trouble...

The quirky bestselling author Paul Legert suspects that his lost novel has been published by a competitor. In order to convict him of plagiarism, Legert has to find the impostor in Ibiza and force him to confess. There he is soon confronted not only with the publisher's assistant Hanna Weiler, but also with ideas that turn his world view upside down.