Learning that Luke Skywalker and Kam Solusar are on the ancient Jedi planet Ossus, Emperor Palpatine orders his Darkside Executor Sedriss to bring back the two Jedi – alive.Meanwhile, amidst the ruins of Ossus, Luke and Kam find a young man and woman tied to an ancient tree. Luke senses the two youths – whose names are Jem and Rayf – are potential Jedi. When Luke frees them, he incurs the wrath of their tribe, the Ysanna.But when Sedriss and his shocktroopers attack, the Ysanna warriors help the Jedi defeat the Imperial darksiders. In a desperate attempt to save himself, Sedriss takes the young woman Jem Ysanna captive.Unexpectedly, Sedriss confronts a new adversary – the withered old "tree" is in fact an intelligent being – Master Ood Bnar, a 5000-year-old Neti Jedi! Awakening now from a thousand-year sleep, Master Ood engages Sedriss in a great Force-battle. The encounter ends disastrously when Master Ood draws down a massive charge of energy that destroys them both!Examining the place where the departed Jedi stood, Rayf Ysanna discovers Jedi treasure hidden under Master Ood's roots – a trove of long-forgotten lightsabers!Elsewhere, across the Galaxy, Rebel commandos led by Lando Calrissian and Wedge Antilles set into motion a dangerous plan to strike at the heart of the Empire!