The Player is in the Imperial Prison when the Emperor and his bodyguards need to go through his cell to escape from the Imperial City. The Emperors sons are asassinated. The Player goes to Kvatch where he finds the last heir of the Septim Bloodline. The emperor has been killed while escaping from the City. The Player must help the heir Martin Septim to save the world from the Oblivion Crisis. And joining the Blades, Save Kvatch from Oblivion, Save Bruma, and be the Champion Of Cyrodiil.