The spirit of dark Jedi Freedon Nadd leads his protégé Exar Kun to the fourth moon of Yavin, the legendary refuge of a group of Sith renegades. There, Exar Kun is captured by Massassi tribesmen, the degenerate descendants of ancient Sith.
The Massassi torture Exar Kun and destroy his ship. Kun finds his light-side power mysteriously blocked, but through the unrelenting insistence of Freedon Nadd, Kun uses the dark side to free himself and take control of the Massassi.
Exploring Yavin's temple ruins, Exar Kun finds a powerful Sith amulet... and unwittingly frees a hideous guardian creature. The monster slaughters dozens of the Massassi before Exar Kun manages to subdue it by focusing dark-side power through the Sith amulet.
Peering into the depths of the amulet, Exar Kun beholds a vision of himself as the great and powerful Dark Lord of the Sith of Massassi legends. Empowered by the vision, Exar Kun turns on the spirit of Freedon Nadd, using the amulet to obliterate the dark spirit. As he vanishes, Nadd manages to send a warning across the galaxy to his other protégés: Satal Keto and Aleema of the Krath.
Elsewhere, Ulic Qel-Droma formulates his own plans for infiltrating the Krath and bringing about their downfall. Completing his research at the great Jedi learning center on Ossus, Ulic bids farewell to his friends... and to Nomi Sunrider. Nomi, whose love for Ulic continues to grow, tells him she will come looking for him in a month. Ulic orders her to stay away, and they part on a note of discord.
Arriving in the Tetan capital city of Cinnagar, Ulic poses as a fallen Jedi turned smuggler. During a public execution ceremony, a group of dissidents attempt to assassinate Satal Keto and Aleema. Seeing his opportunity, Ulic joins the battle, and saves Aleema’s life.
Sensing Ulic's power, Aleema welcomes him as a powerful ally. But her cousin Satal is not convinced of Ulic Qel-Droma's intentions...
The Krath are tearing through the galaxy, laying claim to any inhabitable planets they come across, and they're crushing anyone who stands in their way! But Ulic Qel-Droma isn't just anyone; he's a Jedi, perhaps the greatest of his time. Ulic poses as a fallen Jedi turned smuggler in an effort to infiltrate the Krath, figuring the best way to stop their tour of terror is from the inside.