Julien Couturier and his wife Louise, a young couple from Auvergne who have come to Paris to try their luck for the first time in their lives, become the owners of the "Café du Cadran" ("Clockface Cafe"). On opening day, they meet the people who will become their clientele. It's a busy place, with regular customers served by two waiters, Jules and Victor. While Julien is comfortable in his role as boss, Louise doesn't quite get used to this urban world, where everything moves faster, especially human feelings. She often misses Marcenait, the village in Auvergne where she and her husband ran the "Café du Commerce". Mr. Luigi, a café customer and violinist who performs at the "Café de Paris", has undertaken Louise's cultural education. He teaches her how to dress and do her hair, while recounting his musical successes and travels, skilfully playing on his undeniable seductiveness...

Benjamin Déboisé, a hatter, his salesman and a young man want to kidnap an American millionaire, put him in a bag and hold him to ransom. But they make a mistake: the fellow they find in the bag is not the millionaire himself, but his son...!