In order to save their friend Smiley, Artoo-Detoo and See-Threepio have fallen in with a crew of Targonnian revoltists looking to overthrow Dictator-Forever Craw. Smiley is trapped in Craw's castle, behind the palace's impenetrable force field. To save their friend, Artoo-Detoo and See-Threepio must infiltrate the castle and shut down its protective field! The droids need to save Smiley because his brain contains the secret of the savorium herb . . . a secret which could shake the galaxy to its foundations!