Still haunted by the death of Anakin Skywalkers beloved Padmé in Revenge of the Sith, Darth Vader is tasked with a mission to locate a lost Imperial expeditionary force--led by the son of Vaders rising nemesis, Moff Tarkin. But the perils of Vaders journey into the unexplored Ghost Nebula are compounded by traitors among his crew and the presence of the systems religious leader, Lady Saro.