In a land on the edge of all that is known dwells Princess Winterhued, erudite, beautiful, broken-hearted. The heir to her father's kingdom and raised to be queen, she is troubled by terrifying dreams and now finds the half-demented king turning against her. Slimy sycophants whisper in his ear, persuading him that a 'mere woman' is incapable of ruling, and now he ogles the princess's ladies-in-waiting and boasts of begetting a male heir. But Winterhued's fears become as naught when a vast and ancient being comes flying on dread wings to lay siege to Castle Lawhill. Trailing fear and slaughter, it traps Winterhued and her people within the broken walls. The princess strives to save her subjects, but it seems the only one courageous enough to help her is the lowliest servant-boy in the castle. Yet from the east, riding across wraith-haunted Iron Crag, comes a nameless knight, exiled and condemned... and a horned creature follows him, silent as moonlight.