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.
In keeping with Alderaanian tradition, Princess Leia undergoes her Day of Demand, where she claims her right as heir to the throne and determines how she will prove herself worthy. Yet things have been tense between her and her adopted parents, Queen Breha and Viceroy Bail Organa. As Leia - also a member of the Empire's Apprentice Legislature - undertakes her challenges of the Body, Mind, and Spirit, she learns more about her adoptive parents than she ever suspected and begins her own journey that will forever change the galaxy.
Sixteen-year-old Princess Leia Organa faces the most challenging task of her life so far: proving herself in the areas of body, mind, and heart to be formally named heir to the throne of Alderaan. She's taking rigorous survival courses, practicing politics, and spearheading relief missions to worlds under Imperial control. But Leia has worries beyond her claim to the crown. Her parents, Breha and Bail, aren't acting like themselves lately; they are distant and preoccupied, seemingly more concerned with throwing dinner parties for their allies in the Senate than they are with their own daughter.
Determined to uncover her parents' secrets, Leia starts down an increasingly dangerous path that puts her right under the watchful eye of the Empire. And when Leia discovers what her parents and their allies are planning behind closed doors, she finds herself facing what seems like an impossible choice: dedicate herself to the people of Alderaan--including the man she loves--or to the galaxy at large, which is in desperate need of a rebel hero...