Koni, Bill and the Girls' Gang

Koni has to stand up for Bill. Tanja, a student from the parallel class, mistreats her classmates. Suddenly she has picked a fight with Bill. What can Koni do for his friend? How can he help Bill escape Tanja's gang? Luckily, Ana and Dina are with him. True friends can trust each other. Philip is also with them, always ready to help.