Every two years, Unesco chooses to commemorate figures who have radiated throughout the world, promoting the values of humanity in the service of peace. For the 2022-2023 biennial, France has chosen to present Thérèse de Lisieux, whose 150th birthday is being commemorated. This choice highlights what might appear to be a paradox: little Thérèse, a cloistered Carmelite nun who died of tuberculosis at the age of 24 without ever leaving her convent, is famous the world over, far beyond Catholic circles. This film is an opportunity to understand how and why Thérèse is so venerated in every corner of the globe. Thérèse was imbued with a missionary spirit throughout her life, and even in her early childhood in France, which at the end of the 19th century was gripped by a powerful missionary impulse. She was able to fulfill her vocation by entering the Carmelite order to live a contemplative apostolate, in communion with missionary priests, notably two of them, Maurice Bellière and Adolphe Roulland, with whom she kept up a regular correspondence. After her death, Thérèse continued to support and inspire missionaries from heaven. Through the “rain of roses”, the countless miracles that took place through her intercession in mission countries, but also by inspiring numerous vocations on every continent, notably in Africa, in Benin, where the first Theresian congregation, the Oblate Catechists Little Servants of the Poor, was born in 1914, well before her beatification. Thanks to the success of the peregrination of her relics to the four corners of the world, she also participates in the new evangelization by continuing to proclaim her message of trust and love, thus fulfilling the prophetic words she wrote to Father Roulland just before her death: “Believe, my brother, that your little sister will keep her promises, and that with happiness her soul, freed from the weight of the mortal envelope, will fly to the distant regions, which you evangelize.”