 He manipulates his cousin, Ben, into killing the deposed Chief of State, Cal Omas, only to warn Coruscant authorities that an assassination attempt is imminent.He then tortures Ben as part of a plan to make him a Sith apprentice, which is interrupted by Luke Skywalker, prompting a furious lightsaber duel that ends with Luke sparing Jacen when Ben's danger of falling to the dark side becomes apparent to Luke.A subplot in the book reveals the existence of a hidden group of Sith on Korriban and further reveals the powers of "Ship", the Sith vessel Ben recovered from Ziost.