Fonctionnel tells the story of David, a young and ambitious civil servant with a promising career, who tries to balance professional performance with personal life. Confident in his ability to manage daily pressures, he relies on a consumption habit he believes to be controlled, harmless, almost ordinary. But behind this façade of control, an imbalance slowly takes root. Until one day, everything unravels, and the boundaries he had set for himself shatter. Through David’s journey, Fonctionnel thoughtfully and sensitively explores the grey areas of so-called “functional” consumption—the kind that quietly embeds itself in our routines, often masked by a sense of normalcy. A film that invites reflection, offering a human and nuanced perspective on a contemporary reality that affects us closely—sometimes more than we realize.