As France's first ZAC (Zone d'Aménagement Concerté, or concerted development zone), Grigny is the ideal place to describe how France transformed its dream of a happy suburb into an impoverished urban nightmare. The film aims to leave the camera rolling throughout the story, to discover the inhabitants and the labyrinths of yesterday and today, and to answer the essential questions. From the residents to the architects, including the city of Grigny, the mayor, the prefect, the landlords, and the ANRU (National Agency for Urban Renewal), the film examines and deciphers the consequences of what happened in Grigny and the state's housing policy. Through the analysis of Grigny's history, we see how the state has participated and continues to participate in the creation of social exclusion.