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.
With so many Jedi Generals occupied with the Clone Wars, assignments that would usually go to Knights or Masters are falling to Jedi in training—in this case, masterless Padawan Nuru Kungurama. Accompanied by his squad of clone troopers and a hulking swoop biker named Gizz, Nuru's job begins as a routine protection detail, but soon evolves to include a mystery massacre, the hijacking of a space freighter, and the kidnapping of a group of orphaned younglings!