Beyond the main dragon threat, the weaves in three additional narrative arcs:
The journey starts in the year , with you—the player—caught in an Imperial ambush while crossing the border into Skyrim. Just as you are about to be executed at Helgen, the dragon Alduin, the World-Eater , attacks the town, ending a centuries-long absence of dragons. This event triggers the "Dragon Crisis," where you discover you are the Last Dragonborn , a mortal with the soul and blood of a dragon.
Your primary quest is to learn the power of the (Dragon Shouts) to defeat Alduin and prevent the prophesied destruction of the world. Expanded Legendary Sagas