A comedy that follows an ex-con who lands a position at a school that sits over the spot where money from one of his earlier robberies was stashed.

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.

Mr. Müller is not satisfied with his new work at the Goethe-Gesamtschule. The early getting up and correcting exams annoy him. Director Gerster wants to improve the image of the Goethe-Gesamtschule because she wants to be a symbol of the new company. To achieve this, she wants to take away the partnership from the Schillergymnasium with a Thai school. So, Mr. Müller, Mrs. Schnabelstedt and the 10b must go on a school trip to Thailand.