In 1991, 24-year-old Detective Alexandre Falco has it all, a loving wife, a new-born daughter and his dream job. But one day out in the field, he is shot in the head. Falco opens his eyes again 22 years later to a changed world, where everything he once had is no longer as it was.

A Senegalese bank-robber born and raised in France is getting over a disastrous heist. As he considers going straight, his cousin calls him from Dakar with an easy opportunity.

Jean-Pierre (Jacques Villeret), un attaché humanitaire qui travaille au ministère des Affaires Etrangères, accepte de reconduire un jeune clandestin (Lorant Deutsch) dans son pays d'origine. Celui-ci appartient à la tribu des Hommes Gris d'Irghiz, réfugiés depuis la préhistoire dans une cité interdite du Haut Atlas.