The chronicle of a family that owns one of the largest estates in Europe, on the south bank of the River Tagus. The Domain delves deeply into the secrets of their homestead, portraying the historical, political, economic and social life of Portugal, since the 1940s, through the Carnation Revolution to these days.

Dreaming of great adventures and of standing up for his homeland, a young Portuguese man enlists in the army during World War I and is sent to the front line in Africa, Mozambique. Left behind by his platoon, he sets out on a grueling trek across the mystic Makua native land, walking for over a thousand kilometers, in search of his dream.