After deception and defeat by Rebel forces and the escape of Luke Skywalker, Darth Vader is on a mission to instill fear and discipline in Imperial ranks with a group of elite stormtroopers - and the Dark Lord's own lightsaber. But after the Rebels once again evade Vader's wrath, Han Solo, Chewbacca, Princess Leia, and Luke Skywalker find themselves together on the Millennium Falcon, going undercover to strike another blow against the Empire!