The Return to Narnia tells the story of the Pevensie children's second trip to Narnia. They are drawn back by the power of Susan's horn, blown by Prince Caspian to summon help in his hour of need. Narnia as they knew it is no more. Their castle is in ruins and all the dryads have retreated so far within themselves that only Aslan's magic can wake them. Caspian has fled into the woods to escape his uncle, Miraz, who has usurped the throne. The children set out once again to save Narnia.