No Overflix. A handful of prisoners in WWII camps risked their lives to take clandestine photographs and document the hell the Nazis were hiding from the world. In the vestiges of the camps, director Christophe Cognet retraces the footsteps of these courageous men and women in a quest to unearth the circumstances and the stories behind their photographs, composing as such an archeology of images as acts of defiance.