Colonel Heinz takes a vacation and leaves the assignment to find the formula collection to Kenny. The only clue he has is a map of a derelict chocolate zingo factory. The clue leads Kenny and the children to the school.

Has Dr Deo disguised themselves as a teacher and mähälied the entire school? While secretly recorded, the bioligy teacher, Slimy Sven, takes the forumla collection from Markus. Is he Dr Deo? Kenny and the children breaks into the school to uncover the mystery.

Kenny and the gang flees the monsters in the catacombs. Kenny has figured out who Dr Deo is but falls in love with Mona and forgets the mission. Who will save Earth now?

Markus has been kidnapped and Tyrone has been mähälied. With Burken behind the controls, Kenny and Sofia descend into the catacombs to settle the score with Dr Deo alias Colonel Heinz!