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.
Anakin Skywalker and his friends are in big trouble. Slave hunters are after them. The fate of the Ghostling children rests in their hands. And they have only one chance to find freedom.