Anastasia Severe is a young woman of twenty years in search of her estranged father, George Severe, who had abandoned her and her mother ten years earlier. A telephone call from the Mount Washington weather observatory in New Hampshire propels her search onto a mysterious levitating land, but she is not alone in her search. Characters from both worlds seek her father and Wind Castle for their own purposes. All she wants is to ask her father why he went away, why he would not take her with him. Her father's former employer follows her to find the strange land, hoping to use it for military purposes. Anastasia's search is frustrated by one resident determined to kill her father and rule the strange land. Her father and his friends must find a way to guide Anastasia to them so she can save herself from the manipulation of the vengeful resident.