Darth Vader dies in the arms of his son, having killed his master and gone back to the light side of the Force.

And then he wakes up, finding himself into a little primitive planet that hasn't even achieved interstellar travel, where the government is corrupt and the heroes are ineffective, in a city that could almost be called a hive of scum and villainy, dominated by a gang that calls itself the Empire 88 and another that practices slavery.

He wants to be better, he wants to overcome his past, but really, the city isn't making it easy for him.

Sometimes, a former Sith Lord just wants to force choke someone.