It is 1891. Almost a century ago, the Great Disruption threw all of the continents into different time periods, from prehistory to the far future. In this new world, map-making has become a fine art - a mixture of both science and magic.
Sophia Tims comes from a family of explorers and cartologers. Eight years ago, her parents left on an urgent mission and never returned. Now she lives with her brilliant uncle Shadrack, the foremost cartologer in Boston, who teaches her everything that he knows.
Then Shadrack is kidnapped. Sophia must search for him with help of Theo, a refugee from the West. Little does she know that their lives are in as much danger as her uncle's. As they journey, Sophia must safeguard the most important artifact in his collection - a map that reveals the single greatest treasure in the world.
