Leviathan

1914. Prince Alek of Austria-Hungary goes on an unusual practice session in a Stormwalker. In Edinburgh, Sharp eagerly takes flight in a Huxley.

As Europe teeters on the edge of an all-out war, Alek struggles with his new life in hiding. Sharp gets acquainted with the Leviathan and its crew.

Alek learns why he's hunted and, despite Volger's advice, sneaks out to aid the Leviathan's crew. He saves Sharp, who doesn't buy the prince's story.

With Clanker forces hot on their tail, the wounded Leviathan needs a miracle to get off the ground. Alek makes an offer the Darwinists can't refuse.

The Leviathan encounters a deadly Clanker weapon on its journey towards Istanbul. Upon arriving in the city, Alek and his comrades make plans to escape.

Sharp and Dr. Barlow finally meet the Sultan, hoping to smooth things over with a rare gift. Meanwhile, a mysterious girl saves Alek from a German patrol.