The men of Chemics International lead a quiet life. However, this is cruelly disrupted by an industrial accident in which a toxic substance is released. Some workers are killed; many others are irrevocably contaminated and may suffer permanent injuries. The management, government, press and unions do not react, seeing this as an unfortunate incident. When one of Herman and Jef's best friends also dies, they have had enough. Together they made an ultimate attempt to reveal the truth to the outside world.

The film follows a prison warden (played by Charles Janssens) who is utterly miserable because his prison is empty. When Max (played by Paul Cammermans) is mistakenly arrested for murder, the warden is thrilled to finally have a "guest." A delightfully absurd situation ensues, with the warden looking after his prisoner like a doting father. In the end, Max is proven innocent and marries the warden’s daughter. Based on the play of the same title by Jos Janssen.