BBY/ABY is used to position items along the Star Wars Timeline. BBY refers to Before the Battle of Yavin. ABY refers to After the Battle of Yavin. The Battle of Yavin in Episode IV: A New Hope occured in 0 BBY/ABY.
Rise Of The Sith
Qui-Gon has gone off in pursuit of his former apprentice, Xanatos, without the permission of the Jedi Council. Obi-Wan, mending his relationship with his Master, has chosen to stick by his side. They soon find themselves in the heart of Xanatos’s seat of power on the mining world of Telos, where they are framed and flee as fugitives. If they hope to survive, much less to defeat Xanatos once and for all, they must join forces with a less-than legitimate group of Telosian rebels.
Qui-Gon Jinn's evil former apprentice, Xanatos, has set a trap for his old Master. He has lured Qui-Gon and young Obi-Wan Kenobi to his home planet of Telos… and has framed them for a crime they did not commit.
The penalty is death.
Suddenly Qui-Gon and Obi-Wan are fugitives on a planet where everyone is an enemy.
Xanatos' day of reckoning has come.