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.

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.