Twelve-year-old Sophia Warner comes from a long line of Dream Watchers, humans possessing magical abilities from the Sandman himself and entrusted with protecting the Dream Realm. Frustrated by her slowly evolving powers and the continuous disapproval of the Council of Dreamers, Sophia becomes more and more reckless as she tries to force her full abilities to manifest in a desperate quest to locate her mom—who went missing in the Dream Realm four years earlier. But things take a dangerous turn when Watchers begin to go missing and the ruler of the nightmares, the Shadow Queen, is to blame. Trapped on a dark island in the world of dreams by the Sandman long ago, the evil queen craves to find enough magic to finally break free from her prison and take over the Dream Realm. As the only child Dream Watcher, Sophia is told to stay out of it. But when tragedy strikes her family, and the Council of Dreamers hesitates to intervene, Sophia is forced to make a choice. With the help of her best friend, a magical cat named Cosmo, can Sophia not only conquer her own fears and learn to control her magic, but also stop the Shadow Queen’s evil plans before all is lost?