Evanella, who writes the “Horoscope” section of a major newspaper, and her brother Méristo, create with the help of a young journalist, Jean Lassère and the capital of their uncle Amédée, a “Bureau des Prédictions”. Success being expected, they manage to obtain revelations about a gang of gangsters which they publish as predictions. It is success and fortune. Jean marries the newspaper director's daughter and Evanella the director himself.