Zeki Müller (Elyas M'Barek) has hung up his thuggery and decided to become a teacher. But the early wake-up calls, erratic pupils and eternal correcting of exams are gradually starting to annoy him.
On top of that, the headmistress Gerste (Katja Riemann) decides that the best way to improve the school's reputation is to form an international partnership with a Thai high school.
So Zeki and Lisi Schnabelstedt (Karoline Herfurth) are sent to Thailand, accompanied by the students from 10B, who throughout the trip try to be even more insufferable than before. In Thailand, a competitive battle then breaks out with a teacher from the local high school, the snobbish Hauk Wölki (Volker Bruch), who has one goal - to end Zeki's career...