The story is set in the next century, in which the Netherlands is built over and a large traffic jam has taken place, which has never disappeared. There are long rows of car wrecks along the roads. The air is gray from the exhaust fumes, the water is undrinkable and there is no longer a flower or plant to be seen. Only one thing grows in the Netherlands: pickles. August Horks wants to demolish the last windmill in the country to build the Horks Gherkin Plant. Together with her father Hielke, the Zeeland Girl tries to save the windmill.