Adin Ergo was a young boy at the time of the Beacon Company campaign -- he and his father fought in the Battle of Dromund Kaas (his father under the influence of the Mind Collector).

When the temple was bombed by the Republic, Adin was sealed underneath the rubble with the remnants of the Mind Collector for over a year. Sustained by Dark Side Force energy, he survived in solitude until he was rescued by Jedi Bendarin Fellspire and taken to Coruscant to train as a Jedi.

Unfortunately, Adin's connection to the Mind Collector had created a mind link between him and the Collector's creator -- Kahzan, aware of this link, abducted the child from the Jedi Temple using Tono, a Clawdite who impersonated Bendarin.