 A shy projectionist Emile Petit has a passion for film and is in love with his co-worker at the cinema, Maud.His friend, an exuberant yet obnoxious inventor and delivery driver, Raoul, picks him up from work to transport him in his bizarre vehicle (called "Catherine"), to obtain a new belt for his projector.In purchasing a new belt, Emile also buys himself a new camera, which would’ve been stolen by a local thief had “Catherine” not malfunctioned.