Beissl and his wife are quite surprised when Ellis's 15-year-old niece, Ava, suddenly appears at their door from Berlin. In her backpack, she carries not only a pair of headphones but also a few secrets that will soon leave a sour taste in Beissl's mouth and make Johanna an accomplice. When has there ever been a case where one's own colleagues harass a family member for fare evasion? Professionally, the head of the Berchtesgaden police is also confronted with unpleasant memories. Six years ago, he was the first officer on the scene of a bank robbery – and he didn't exactly cover himself in glory.
Now, one of the bank robbers, Martin Zimmermann, has been murdered in the Böcklmoos moor, shortly after his release from prison. His accomplice, Vitus Neubert, was never caught, and the stolen money was never recovered.

The internet is down at the Beissl house. Therefore, Johanna has to personally deliver the news of the cabaret artist Kuno Horn's death to her father. He was found bludgeoned to death on a forest path. Beissl is devastated, as he was a fan of Kuno Horn and had tickets for his performance that evening in Berchtesgaden.
Horn's agent, Gaby Hoffmann, and the local promoter, Roman Meiser, are shocked by the cabaret artist's death. But suspiciously quickly, they replace him with the more "popular" comedian, Bast Moor.