Until the end of the 1930s, the Carmel of Lisieux regularly published "rains of roses", collections of testimonies of people healed, converted, and reconciled through the intercession of little Thérèse. Thérèse had promised to "spend her heaven doing good on earth", a promise which is being fulfilled in the four corners of the world.

It is this miracle worker Thérèse that Guy Gaucher presents to us through numerous testimonies. At the end of the 1997 World Youth Day in Paris, John Paul II announced to an enthusiastic crowd that Thérèse would be proclaimed a Doctor of the Church. It is as a privileged witness that Guy Gaucher recounts this process which led the little Norman Carmelite to become the third woman in the history of the Church to receive this title. Therefore, the missionary momentum that inflamed the young nun will resume throughout the world. From the Philippines to the United States via Iraq and Siberia, the relics of the "patroness of the missions" will thus touch the hearts of men at the dawn of the 21st century.