Suddenly go to school again, who has not already awoken from this nightmare? For the teacher Fabian Sorge from Cologne it becomes reality. Shortly before his appointment as a tenured German civil servant, it comes out that he falsified his high school diploma as a young man. In times of a lack of teachers, the school board gets involved in a deal: He gets his job back if he completes his high school diploma within one year. In this way, the suspended teacher not only gets to know the strange world of adult education, but also the needs of his classmates, who want to graduate from their social seclusion. But a property shark threatens to destroy their last chance.