Documentary shot in an agroforestry workshop by Cooperativa Sitio, in Viseu, Portugal, about all the knowledge and philosophy that's behind it and the interest of so many people in this way of sustainable agriculture. Agroforestry (or food forestry) is a production method that proposes not the creation of a new production environment, but that man, and the agricultural production from which takes advantage, are included in a forest environment. The method is, in its essence, an attempt to imitate nature. In nature, most plants live in association with other species, which they need for a complete and healthy growth. In the 70s, Ernst Gotsch worked with the genetic optimization of plant species. This research lead him to the conclusion that instead of trying to adapt the species, he could get better results if he created agroecosystems in which plants, in a cooperative system, would develop vigorously without chemical inputs. He implemented numerous complex and highly productive systems that avoided all kinds of fertilizers and pesticides. Since 1993, after achieving outstanding results, he has dedicated himself to teach his methods all over the world. Today, Ernst advises non-governmental organizations, universities and rural technical assistance agencies in almost all regions of Brazil as well as organizations in Europe and Latin America.