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, Tahiri, Ikrit, and Tionne set off to the spooky planet of Vjun—infested with parasitic plants and ghosts of dark siders of the past. They're chasing the rumor that Obi-Wan Kenobi's lightsaber was retrieved by Darth Vader and hidden in his now abandoned fortress. This story is truly one of the long lost gems of Legends storytelling.
Anakin Solo and his friends--including Tionne and the Jedi Master Ikrit--venture into Darth Vader's abandoned fortress on the planet Vjun to recover Obi-Wan Kenobi's lightsaber, supposedly hidden within the deadly walls of the stronghold