Sebastian decides to produce a documentary about what worries humankind, with the objective of arriving at a General Theory with a universal reach. He has no knowledge of cinematography since he is a lawyer by trade; however, he learns what he can about film making, buys a small video camera and a used sound recorder, and takes off on a journey in which he will ask different people: what is it that worries them? what are they afraid of? and how does one achieve happiness? He travels from La Quiaca (the northernmost point in Argentina) to Ushuaia (the southernmost); along those 5,500 km he is accompanied by a cyclist, who carries out the whole trip on his bicycle. They travel slowly, the trip lasts 80 days. Along the way Sebastian encounters difficulties of all kinds; initially they are technical as he gradually learns to use the filming and recording kit, to ask the right questions and to produce his documentary on a daily basis. People answer his questions and as the documentary progresses, Sebastian realises that although he has more and more material to work with, he still struggles to define the meaning of the documentary, the meaning of his trip and the meaning of his own circumstance. He begins to have problems with the script. The documentary is a question generator that will set Sebastian and the audience the inevitable task of contemplating the crux of their own worries and how these tie into their happiness. As the interviews roll, they are weaved into the travels of the Producer, and in doing so reflect an inner change in Sebastian, who begins to understand that the recordings he makes will not lead to a General Theory on Human Worry, that the trip is not turning into the film he thought it would, and that what he will really find at the end of the road is something different: he doesn’t solve a general theoretical problem, but instead he solves the issue of his own worries through action. The way out of theory is practice.