Through a collection of interviews and an immersion of several weeks on film sets in the North of France, Thibault Pomares tells the great story of the cult series "The Little Murders of Agatha Christie". On the programme, twelve years of time travel with testimonies from the creators, directors, set designers, costume designers and leading actors of the series (Samuel Labarthe, Blandine Bellavoir, Élodie Frenck, Antoine Duléry, Marius Colucci, Émilie Gavois-Khan, Arthur Dupont, etc.).