A weak ruler is capable of nullifying all the achievements of his predecessors... While the pharaoh enjoys lush festivities and the spectacle of bloody mysteries, an internecine war is shaking the power of Ancient Egypt, wild tribes are rampant on the borders, robbers are rampaging outside the cities, and hordes are approaching the banks of the Nile from the east barbarian Hyksos on chariots drawn by unprecedented maned beasts. Realizing that the weakened kingdom faces imminent destruction, the pharaoh's wife and mother of the heir, Queen Lostra, decides to leave Thebes, the Hundred Gates. With the help of her faithful servant and adviser Taita, she equips a huge flotilla to retreat to the upper Nile, preserving the Egyptian people and army. Ahead are the terrible rapids of the Great River and the unknown lands of Africa, full of wonders and dangers...