In preparation for a feature-length film about windmills, an assistant director travels through the Vaud region to search for locations with windmills. The research leads to a serious engagement with the meaning and purpose of windmills, which has something Don Quixote-like about it in the age of nuclear power stations. The transitions between document and fiction flow constantly and result in a charming and intellectual mixture of seriousness and fun, determination and coincidence, weightlessness and the weight of meaning.

En 1975, le réalisateur suisse Michel Soutter se lance dans un documentaire-fiction qui met en scène son propre assistant, Michel Schopfer, alors que ce dernier prépare un film dédié aux éoliennes. On le suit dans les différentes étapes de ce travail, en forme de chronique expérimentale et fantasque.