In 1976, the second trial of Pierre Goldman, a far-left activist suspected of killing two pharmacists during a robbery gone wrong, was held. The case mobilized many media figures.

In post-war Lebanon, Ida, a young Lebanese girl, flees her small village and her alcoholic mother and goes to the big city. There, she starts dating a European man not knowing what is in store for her.

Fired for insubordination, PJ Antoine Verlay, good cop but a blood strand and having difficulty working as a team, is attached to the OCBC (Central Office for the fight against Traffic in Cultural Goods) thanks to the intervention of the commander Pardo, his friend who becomes, therefore, his new superior. A clever investigator, but a stranger to everything related to culture, Antoine will have to work with Florence Chassagne, renowned art historian, who lives, speaks and breathes culture, to the point that - fruit of her great imagination - it happens to her in the midst of daydreams, to see and talk to the great artists who have disappeared as if they were familiar to her.