Luke Skywalker is worried: A handful of Jedi Knights, including his nephew and niece, Jaina and Jacen Solo, have disappeared into the Unknown Regions in response to a strange cry for help that only they could hear. Now the alien Chiss have angrily lodged a formal complaint, accusing the missing Jedi of meddling in a border dispute between the Chiss and an unidentified aggressor. Luke has no choice but to head to the Unknown Regions for serious damage control. Han and Leia follow, intent on protecting their children from what could be grave danger. But none of them are prepared for what they find when they reach their destination.