After a botched assassination attempt against the Chancellor, Zannah discovers a dark side user, Hetton, who has uncovered the location of a tomb of an ancient Sith on the Deep Core planet of Tython. It is rumored that this tomb contains a Holocron with the key that Bane needs to produce his own. After killing the pseudo Sith, Bane and Zannah set off on their respective missions: to recover the ancient Holocron, and infiltrate the Jedi Archives for information on removing the orbalisks.