Scottish wildlife filmmaker Gordon Buchanan realises a lifelong dream by getting up close and personal with a family of rare Grauer's Gorillas in the Democratic Republic of the Congo. The largest primates on Earth, Grauers gorillas are beautiful yet little-known giants living in the foothills of eastern Congos Virunga volcanoes. To get to know his gorilla family, Gordon must first earn the trust of a massive and potentially dangerous Silverback male.