A mistake lead to the migration of the antisocial, dutch family Flodder to Zonnedael, a very wealthy town. They however do not adapt themselves to the neighbours and instead tyrannize the complete neighbourhood. All attempts of the residents to get them removed from the neighbourhood fail, and because of the oldest brother of the family, they never get caught by the police doing something illegal.
Kees is kissed by an ex of Johnny, who just returned from a trip. She seemed to carry the Enola virus which is deadly.
That evening Sjakie visits the Flodders. The following day he will go to Africa in order to visit an indigenous tribe which until recently had not yet been discovered. Kees doesn't feel so well. Then, the health service does an invasion and declares that Kees possible has the virus aswell. The whole family will be placed under quarantine, because there is no cure against the virus.