With the Sith Empire destroyed and Zakuul in shambles, the Republic can begin its restoration plans for the galaxy with the aid of the Jedi Order. Menelaus and Morgause, the children of rogue Force-sensitive Hyperion, have been trained in the ways of the Jedi and the Dark Side, prompting the Council to send them in search of Sith artifacts. What they uncover is far more sinister.

Cassandra Lyn has been Knighted and Talzin is dead but her ambitious ally, Triclops, still has plans for the galaxy. But within him lies a feverish ambition to find and master the powers said to be contained in the mask of the ancient Sith Lord, Darth Nihilus. As his ambition and Cassandra's power grow, an old ally holds the key to saving the galaxy or utterly destroying it.

Arden Lyn is dead but her legacy and everything she has known is carried on by her daughter, Cassandra. Taken into Luke Skywalker's Jedi Academy as one of his first students, young Cassandra is soon apprenticed to the grandson of Emperor Palpatine known as Ken. But as her skills develop, so too does the evil Mother Talzin's interest in her heighten to nefarious intensity.