In a world of airships and Sky Spirits, Jovin hides behind the mask of the Crown Prince of Canston.

Jovin's first solo diplomatic tour is sabotaged by two pieces of news: rebellion threatens his country's borders... and his eleven-year-old brother is coming with him.

Young Merik, with his pet mechanical hummingbird and inquiring mind, would be enough of a disturbance, but when Jovin's former flame crash-lands in the middle of the night, the adventure takes a turn.

Tensions are high, but the stakes are higher. Danger lurks around every corner, from royal masquerades, to the grime-coated city streets. Not even their airship, the Alexandria, can harbor them now.

Join Prince Jovin, his snarky younger brother, a fiery princess, the kindhearted twins, and their mentor captain in their world of airships and invention, assassins and puppetmasters, where the sky has no limit, and the adventure is only just beginning...