Rejected by the villagers because of their unusual powers, Yonna and her older brother Stan now live on their own in a lonely, abandoned castle. Their gifts have drawn attention anyway. Shadowy figures scheme to exploit them, while the king's government, at odds with those schemers, wants the siblings for itself. A small winged creature named Piggott tries to coax Stan into leaving home to serve the Empire in the capital. Meanwhile, a second agent comes with orders to reach Yonna directly, though Stan resents outsiders and guards his younger sister closely. The film is a short fantasy adventure, running about 30 minutes.