In this crossover event between the Star Wars mainline comic and the Doctor Aphra series, Luke Skywalker teams up with Doctor Aphra on a mission to the Citadel of Ktath'atn (also known as the Screaming Citadel) to visit the Queen and unlock the secrets of the Eternal Rur, an ancient Force user trapped in a strange green crystal. However, they are met with more questions than answers when the Queen launches a plan to control Luke and his comrades with a horde of Abersyn symbiotes—a larva-type species with the ability to control the mind of its prey with a single bite. Luke, Doctor Aphra, and the rest of the Rebels who mount a rescue mission must all work together to defeat the Queen and her minions if they are going to survive...