The Twin flees across the sky, bringing in its wake the Great Tide. The Earth trembles under the shadow of its brother. Times are changing.

The order of the world is in turmoil. An age of industry is beginning, an age of machines fuelled by magic. Sprawling cities rise, strange devices stalk the land. New money brings new power. The balance between the Hundred Kingdoms is upset. For the first time in generations the threat of war looms.

In these turbulent days, fortunes can be won. Magic runs strong in the Kressind family. Six siblings strive – one to triumph in a world of men, one to survive murderous intrigue, one to master forbidden sorcery, one to wash away his sins, one to contain the terrible energies of his soul.

And one will do the impossible, by marrying the might of magic and iron in the heart of a great ship, to cross an ocean that cannot be crossed.