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.
Aphra's mission to make quick credits by auctioning off an ancient Jedi artifact is going to plan… That is, until it isn't. Meanwhile, a dark figure from Aphra's past decides to make an appearance…