Colette Marin-Catherine, 90 years old, joined the French Resistance as a teenager and has never set foot in Germany since the war. Her older brother Jean-Pierre was arrested for resistance activity and died at the Mittelbau-Dora concentration camp, worked to death building V2 rockets in an underground tunnel complex. The film follows Colette as she finally agrees to travel to the camp, accompanied by Lucie Fouble, a young history student researching her brother's case. Interviews at Colette's home establish her sharp, unsentimental voice before the trip itself, where she walks the tunnels, examines camp records, and confronts what happened to a brother she has carried as an open wound for seventy-five years. The camera stays close on her face rather than cutting to archival horror footage, and the restraint is deliberate. Running under half an hour, the film builds toward a single, specific act of witness rather than a broad history lesson, and it won the Academy Award for Best Documentary Short.