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.
Qui-Gon is troubled by a vision of his close companion, Tahl, in great distress. He discovers that Tahl has been working on a difficult mission on the planet of New Apsolon, which he and Tahl had helped stabilize several years earlier. The royal sisters, Alani and Eritha, are in danger, but the adversaries lurk in the shadows. Qui-Gon and Obi-Wan must expose the threat, retread the past, and forge new bonds in order to save the planet and rescue Tahl.
The Ties that Bind begins a dynamic storyline featuring Qui-Gon’s blind Jedi companion, Tahl.