Ben just turned 30. He's a shy man, and is in love with his coworker Diane. He's got two main passions in life : Historical reconstitutions with his figurines club, and his job at the Tourism Office in Nîmes, which consists in taking visitors on board across the city. After a sad birthday party, he's about to go home when he runs down a man with his car. Terrified, he approaches the poor man, only to discover that he's facing a Roman named Volesus, who only speaks Latin and has travelled through time to show up in our present days.