The Prinz-Eugen-Gymnasium is in a crisis, which is not least due to the insolent students who lack any respect for the staff and the chaotic principal. Three new teachers are supposed to bring discipline and order, but due to a mix-up they are exchanged for three escaped lunatics from a nearby asylum who take on these jobs. One of the three is constantly triggered by the duck dance to freak out, a second is a bosom grabber and the third thinks he is an alien who would like to go home. At the same time, a new student joins the group, the smart checker Jürgen, who immediately falls in love with Karin, the kitchen assistant at the local snack bar. Chaos soon breaks out...