Seeking to exploit a fatal flaw in the'Rebel'fleet's escape strategies, the Empire'plants a sleeper agent in the Alliance's midst and sets into motion a series of events that will have devastating consequences for'Luke Skywalker'and his companions. Meanwhile,'Darth Vader's own agenda runs counter to the Empire's schemes, and he's ensnared Lt.'Janek Sunber'to carry out a secret mission that will lead the idealistic Imperial officer straight into the heart of the Rebellion.