As the Jedi know only too well, evil can arise from the most unlikely of sources. In the years after the Great Droid Revolution, two aristocrats, Satal Keto and his cousin Aleema, came to power in the Empress Teta system. Bored and spoiled, they became interested in the secrets of the Sith.
They and their friends formed a Sith cult named Krath. But Satal and Aleema began to crave real power. During a visit to the Galactic Museum on Coruscant, they spotted a book of ancient Sith lore and rituals and decided to steal it.
Once they had the book, they realized it was written in a long-forgotten Sith language. But Satal learned of the planet Onderon, once ruled by the Sith Lord Freedon Nadd, and the cousins left to unlock the book's secrets there.