The twins and Lowbacca are off to the Wookiee's home planet of Kashyyyk, where Lowie's younger sister is about to undergo the terrifying Wookiee rite of passage.  The ceremony is dangerous and difficult, and he wants to help her in any way he can.
Meanwhile, the Dark Jedi student Zekk has been given his own rite of passage:  to lead a raid on the great Wookiee computer center on Kashyyyk.  Finally, he will fulfill his awesome potential.  Finally, he will become the Second Imperium's Darkest Knight.  But first he must face his old friends Jacen and Jaina, once and for all...