The last part of the Bolivian Trilogy. Over a year, five aid workers (two French and two Québecois) from international cooperation agencies film their intervention in a small Bolivian village named Patacamaya. Their heartfelt account allows us to share and understand the slow process of cultural adaptation, the difficulties between a couple in an isolated milieu, as well as the insidious culture shock, which is so often ignored. Through their work in agronomy, forestry and women's issues, they show us the diverse uses of audio-visual teaching aids, especially video, in popular education.