El hijo de Esther

Three biologists from the Institute of Mycology and Botany of the Faculty of Exact Sciences at the University of Buenos Aires (UBA) travel through the Yungas region of Argentina in search of fungi. How do they conduct their work? What do they hope to find? What lines of research do their findings lead to? How important is their work? These are the questions this documentary attempts to answer.

In the middle of the 19th century, in a fort on the Pampean frontier, the Carbajal family -father and son- are left abandoned in a cell after a raid of Indians ravaged the place. Miguel, with very little strength, tries to keep his father, who is seriously wounded, alive.