This article explores the reality of life for young people aged 13 to 18 within French juvenile detention centers, established between 2006 and 2008 with the aim of prioritizing education and reintegration. Through a co-creative photographic approach, the author spent two days a week observing the trajectories, voices, and bodies of these incarcerated youths. The visual narrative captures the evolving environment of the prisons, marked by graffiti, stenciled quotes, and world maps, as well as the stark contrast within cells where individual experiences range from writing and drawing to silence. The article highlights the ephemeral nature of the inmates' expressions, with their writings painted over upon release or transfer, symbolizing the continuous cycle of new stories overlaying old ones, and the physical wear and tear of the facilities, such as broken glass and sawn-through window bars.