After a visit to the Natural History Museum in Paris, Simon Esich is convinced that a prehistoric man has escaped from the Evolution Gallery and is meddling in his life as a modern male. He realizes that this life coach of a new type could help him regain his lost virility and win back his wife Camille, who is becoming increasingly distant since a recent promotion and the appearance of Antoine, a handsome hunk with a devastating smile.

In his motor home, while drinking too much wine, an old “Shlappsteur” (a luxury event waiter) shares anecdotes about the job that ate up his whole life. Funny, rough or melancholic, his memories materialize before our eyes and paint, piece by piece, the portrait of a life dedicated to work.