One day, Billy Jones finds himself in the Kingdom of Night, where the all-powerful Magician rules and the worst nightmares come to life. The magician keeps children the same age as Billy captive in a gloomy fortress. It turns out that they all forgot their parents, their real homes, and now they are children of the night, with gray skin and unnaturally huge eyes. But Billy remembers everything. And he alone can challenge the Magician, free the children of the night and return home!