100 years before the rise of the Galactic Empire, the Galactic Republic and Jedi Order preside during a time of centuries-long peace. In a bar on the planet Ueda, Jedi Master Indara is attacked and killed by a woman wielding daggers. The bartender identifies Osha Aniseya, a former Jedi Padawan learner, as the killer. Osha, who works as a meknek doing dangerous repairs on the outside of starships, denies committing the crime when arrested by Jedi Knight Yord Fandar and his Padawan Tasi Lowa. En route to Coruscant, the galactic capital, Osha's fellow prisoners escape and leave her to crash-land on the planet Carlac. She sees a vision of her twin sister Mae, who was presumed dead in a fire that killed their family when they were young. Osha deduces that Mae is alive and the one who killed Indara. Jedi Master Vernestra Rwoh sends Master Sol, Osha's former teacher, to Carlac with his current Padawan, Jecki Lon, and Yord. They find Osha, and Sol accepts her theory about Mae. Elsewhere, Mae meets with her mysterious master, who has challenged her to kill a Jedi without using a weapon.