Join David on an enchanting journey to the moon-garden, a realm of breathtaking beauty where he encounters Phyllis, a unique child unlike any other in this magical place. While David is granted the freedom to explore and play, he soon learns that he has a greater purpose to uncover the hidden Wonder-Box and the Know-All Book concealed within the Iron Castle and bring them back to Earth. To locate the Iron Castle, David must first find and tame the elusive Black Winged Horse. Will he rise to the challenge and fulfill his destiny? (Summary by Laura Victoria)