Visit the Louvre at night with a torch, or the sewers of Paris, the lake under the Paris Opera. So many new or forbidden activities. Visit the mysteries of Paris, that’s what “Paris Face Cachée” proposes. This campaign was meant to be curious: like looking through the keyhole of a door. But also playful with the labyrinth of Parisian motifs associated. Finally, mysterious, because the poster comes to life at night to reveal its own mystery, thanks to a play of light filtered through absolute black ink on the back.