Darth Vader And Dark Aprentice

long ago in a galaxy far far away
STAR WARS
Vader's secret dark apprentice

darth vader the dark lord of the sith obsessed with searching for a way to overthrow his master emperor palpatine Darth Sidious has already found and trained a dark apprentice secretly from his master with great potential in the force calling him Darth Rigam
Will Vader achieve his goals with this dark apprentice named Rigam in overthrowing Sidious and taking over as the new emperor and dark master of the Sith?
Or will palpatine find out and Vader will be in serious trouble? .....

this story takes place 3 years before episode IV A new hope