Early 1965, the journalist Georges Figon, riddled with debt, is offered a strange assignment: a crime organisation offers him to produce a documentary about decolonisation. Marguerite Duras would write the commentary and Georges Franju would direct. A certain Mehdi Ben Barka would be hired as historical consultant. But the film turns out to be a trap: Ben Barka is arrested. The affair gains amplitude and becomes a political scandal.