A trip back to the dark ages of the 9th century that immerses viewers in the tumultuous lives of the first Vikings leaders, the legendary Danish kings. During their reigns, these formidable warriors terrified the whole of Europe, conquered half of England, seized Paris and even threatened the empire of the great Charlemagne. This docu-series blazes with intense passion, burning ambition and bitter betrayal while recounting a surprising history of scheming in the royal courts and deadly fraternal conflicts.