The pupils at Basserup Municipal School have a test their first day back after the summer holidays. And when the otherwise cheerful and positive boy, Mugge, turns out to have a brain so strange that he causes the computer to explode and the whole system goes into full panic. Mugge is immediately sent to a special class and a dark and gloomy future is predicted. However, nothing can hold Mugge down, and he decides to start his own school. A school where there is room for children with strange brains. At the same time, Mugge's best friend, Sofia, starts at the elite school Killer Instinct School System. The distance between them increases and the friendship soon hangs in the balance. And when a municipal championship is to be organized between the schools, the level of conflict increases, because suddenly they are opponents.