In 2005, when filmmaker Jean-Marie Vinclair filmed the unveiling of the ‘Raymond Vinclair’ plaque in the square that will bear his name, he was stunned: why was this relative, who died as a martyr in Germany during the Second World War, unknown to his own family? A few years later, when the filmmaker is married to a German woman and the father of two boys, the spectre of Raymond haunted him and the enigma remained. Parents and children embark on a quest to find the thread of this lost memory.