Ercan and Erdal run 'De Lierse Ruimingswerken'. Tim runs a cleaning company that specializes in cleaning up heavily polluted and neglected houses. Willy is also back. This time with his granddaughter Ilena (12), who helps to clean mobile toilets during the vacations. Thomas and Karel are specialists in pest control. And Tom and Matthias do unclogs.

Several Flemings are followed who, as professional cleaners, often work in the most appalling conditions and experience the most hallucinatory situations.