Seppi could really be satisfied. His arch-enemy Kevin has now become an ally. Together with Hansi and Merlin, the four consider themselves unbeatable. If it weren't for Schacke-Line and other annoyances. When a project day on the theme of the Middle Ages is announced, the four students sense their chance. They can perfectly use the preparation to showcase their brilliance to everyone else. In their headquarters, they hatch the greatest ideas ever conceived by students. It goes without saying that not everything runs smoothly. Even in the third part of the hit series, Seppi and Co. are once again out of control. Super strong!.