The story chronicles the life of St. Filippo Neri, but the film begins with the saint as an adult, came to Rome in order to embark for the Indies with the missionaries of St. Ignazio di Loyola, but since the board has already taken place, there is more room. Desolate, he walks the streets of Rome, intervened to remove a band of orphans who beat up a man. The man, in gratitude, takes him home and offered him the post of tutor to his son Michele.