Nothing special happens in the quiet, peaceful, and sad German city of Anröchte. Until the day in which its residents’ daily lives are disrupted by strange events: Hun knights armed with sabers perpetrate an arbitrary massacre for no apparent reason, decapitating people at random. Inspector Konka arrives in town to solve the mistery, along with his faithful assistant Walter, a philosopher type who reflects on the human condition as he wanders the melancholic streets of Anröchte.
Smilla Witte (Maria Ehrich) always dreamed of working as a cook in her parents' excursion restaurant "Schneewittchen am See". But after the sudden death of her mother, Smilla literally fled from home ten years ago. After a long time Smilla wants to spend time in her old home again. But she can't last long at home without getting into an argument with her father Heinrich (Jürgen Tarrach). Of course, as so often, this revolves around Heinrich's new wife Regina (Andrea Sawatzki). Without further ado, Smilla stays with her friend Hedi (Hanna Plaß) earlier than planned. She lives together with her brother Victor (Jochen Schropp), his husband Lorenz (Lucas Reiber) as well as two mini pigs and two chickens on the "dwarf farm".
This is the third and final part of the now famously successful trilogy, where Mr. Müller and his problem kids Chantal, Danger and Co. once again take up arms against their sworn enemy, the German education system.
Liv wakes up in a locked room next to her injured boyfriend. The man who arrests her claims there was a bio weapons attack and he saved her. But the stranger knows too well about the young couple, and Liv becomes suspicious. The couple is not sure if they can believe his story.
It's no surprise when Karo is fired. She is loud, over-emotional and egocentric, more so than the average Berliner wise-ass, says her best friend Anna. Karo is not one to give up easily, though: she opts for radical change and goes into therapy. Although her therapist advises her to keep calm, Karo throws herself into it.