A sleeping car employee seeking a well-deserved rest is prevented from doing so by the crowing of his neighbor's rooster. Just as he's about to settle the score, he's presented with a gift: a rubber band around the annoying bird's beak temporarily puts an end to its vocalizations. But the animal can't be left alone, and Pierre has to take it with him on his nocturnal journeys: you can imagine the disturbance it can cause when, after being thrown out of a wagon window, it lands in the next van full of pheasants. The whole little world spills out onto the train, and the conductor is not at all pleased! Pierre manages to get a young passenger to assume ownership of the rooster, but not for long. Every time Pierre tries to get rid of it, it somehow comes back to him.