Shortly before his retirement, Gustav Wanzka wants to return to his beloved profession as a teacher after years of working as a district school inspector. As soon as he arrives at the station, he meets the boy Norbert Kniep, his future pupil, who clearly surprises him with his questions. He wants to encourage the pupil, who is considered uncomfortable to the teachers but is very gifted in mathematics. With his highly personal views on educational goals, Wanzka stands in stark contrast to his teaching staff. Any innovations and even positive conflicts are nipped in the bud, and thus the pupils are ultimately educated to mediocrity.

Kerstin, daughter of a Stasi officer, escaped East Berlin life but is pulled back when her father secretly manipulates her career. After the Wall falls, she and former West programmer Reginald use forged documents and hidden cash to build new identities and jobs, but old loyalties, secret pasts, and resurging temptations threaten their fresh start.