Mees Kees is back in a heartwarming family film full of adventure and new challenges! In this new chapter, the best teacher in the Netherlands is once again faced with various challenges. While Dreus is preparing the school for the organization of the best fox hunt ever, Mees Kees is working with his students on a robot project. Although Mees Kees loves technology, Dreus swears by this tradition - and everything has to go smoothly. Mees Kees is also not sitting still at home: his mother thinks it is time to stand on his own two feet and wants him to finally move. For Mees Kees, this is a drastic change that worries him. Meanwhile, Tobias also has his own problems. Who is that mysterious man his mother keeps talking about? Together with Sep, he comes up with a plan to find out. When the fox hunt approaches, everything threatens to fall apart. Dreus slowly loses control, but Mees Kees and his students decide to do everything together to save the day. Along the way, Mees Kees discovers that change can sometimes be good, and that moving might not be such a disaster after all. Will he be in time to bring the fox hunt to a successful conclusion? One thing is certain: this adventure of Mees Kees is full of surprises and unforgettable moments.