Bébé's nanny reads to him the exploits of Saint Martin, who gave half of his coat to a poor man at the gates of the city of Amiens, so that he could protect himself from the cold. Bébé, marveled by this story, then plays in the park and meets a poor man and his son who are both freezing. Bébé decides to imitate Saint Martin, removes his coat and tears it in two pieces. He gives one piece to the poor boy. Bébé returns to his nanny and tells her his good action. She explains that half a coat is not very useful. Bébé understanding his stupidity starts crying. The nanny takes him by the hand to see the two poor. She mends the coat with safety pins. The poor boy now has a whole coat. After the departure of Bébé and his nanny, the poor boy can now play the lord with his beautiful coat.