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.
Jedi Knights Anakin and Obi-Wan, with Padawan Ahsoka, travel to the planet Taloraan in hopes of gaining some useful allies for the Galactic Republic. But the two ruling groups on the planet are not particularly interested in making a treaty - the Denfrandi are already more sympathetic toward the Separatists, and the Wind Raiders are simply unfriendly to everyone! It may be a merely impossible mission for the Jedi, or one that might end in disaster!