Revan Shan was a padawan of the Jedi order, taught and trained to protect the weak and helpless, or is he, Revan would find his secret girlfriend cheating on him with his long time rival and he stormed out of the Jedi Temple to clear his thoughts.
Revan is then accused of a crime he did not commit and is about to be executed on the steps of the Jedi Temple, almost Ironic, the group that preached peace, and forgiveness was about to execute him on their temple grounds.
At least that's what everyone thought, before a fleet of ships enter Coruscants atmosphere flying the flags of the old True Sith Empire, at their head, Empress Lannika Skywalker, Revans true master.
Revan leaves the Republic and Jedi behind to embrace who he really is, a Sith Lord, born with power and pedigree un matched by any Sith, the Heir of Darth Revan, a scion of Darth Nox, the only apprentice of the all powerful Empress and Goddess of the true Sith Empire.