Princess Liana has been mute since birth, and uses sign language to communicate. Her parents don't understand her at a deeper level, so when a hoverplane crashes in the royal gardens, Liana sneaks on board. Somehow, she's dragged into conflict with a dangerous dictator, who wants... a necklace, apparently? What kind of hijinks will Liana and the young hoverplane pilot get into while trying to defeat a greater power so Liana can be brought home safe to confront her somewhat-well-intentioned parents?