The war on the ground has ended, but the war with the sky has just begun. After the Siege of the Six Villages, the ghost eagles have trapped Uztaris on both sides of the conflict. The villagers and Kartami alike hide in caves, huddled in terror as they await nightly attacks. Kylee aims to plunge her arrows into each and every ghost eagle; in her mind, killing the birds is the only way to unshackle the city's chains. But Brysen has other plans.

While the humans fly familiar circles around each other, the ghost eagles create schemes far greater and more terrible than either Kylee or Brysen could have imagined. In the final installment of the Skybound Saga, the tug-of-war between love and power begins to fray, threatening bonds of siblinghood and humanity alike.