In a dystopian past, a fugitive on the run discovers he's far from alone.

The Men in Black have always protected the Earth from the scum of the universe. In this new adventure, they tackle their biggest, most global threat to date: a mole in the Men in Black organization.

Henri “Papillon” Charrière, a safecracker from the Parisian underworld, is wrongfully convicted and sentenced to life imprisonment in the penal colony of French Guiana, where he forges a strong friendship with Louis Dega, a counterfeiter who needs his protection.

At his father's wake, a young man sets about the task of finding out more about his father by interviewing the guests. Faced with the usual platitudes and pleasantries, normally bestowed on the recently deceased, he challenges the guests to expose their honest feelings and memories...