Tales from Vader's Castle follows the story of Rebel commander Lina Graf and the rest of the crew of her ship, the Auric, as they crash land on Mustafar. With no way to communicate with the rest of the Rebellion and no way off of the lava planet, they are forced to venture towards the only sign of civilization they can find—a dark, eery castle off in the distance. As the small rebel band travels ever further into the bowels of the castle, they relate stories to one another about some of the horrors of the galaxy, including haunted ships, strange monsters, and cursed planets, all starring some of the most well-known heroes of the Rebellion. However, as the owner of the dark castle becomes aware that he has intruders, Lina and her crew realize that their very own horror story may be unfolding before them...