Their escape route just happens to lead through your cell.
Your imprisonment is cut short by the arrival of Emperor Uriel Septim (played by Patrick Stewart) and his bodyguards, the Blades, fleeing assassins who are trying to eliminate the royal family. The game places you in the role of a prisoner, convicted of an unknown crime and incarcerated in the dungeons of the Imperial City.
The Elder Scrolls IV: Oblivion is a Role-Playing Game developed by Bethesda Softworks and released in 2006 for PC and Xbox 360 and one year later for the PlayStation 3.