While Luke Skywalker takes the first step toward setting up an academy to train a new order of Jedi Knights, Han Solo and Chewbacca are taken prisoner on the planet Kessel and forced to work in the fathomless depths of a spice mine. But when Han and Chewie break away, they flee desperately to a secret imperial research laboratory surrounded by a cluster of black holes—and go from one danger to a far greater one.