Desiree is a street rat. An orphan. A mechanic. A thief. A nobody. But everyone has secrets- even a nobody. In a world where France is the technological leader and America was discovered only 100 years ago, the wealthy rule. Space probes have reached Saturn. The country with the best technology leads above all others. However, the government has a law: Hoppers, if seen or identified, are to be turned in immediately. Everyone has heard of them. They're people who can "Hop" from one dimension to the next, from one plane of existence to another. And Dez 's secret is even more dangerous than most: her little brother, Hugo, is a Hopper, and she'll do anything to protect him. But when Hugo accidentally takes her with him on one of his Hops, it'll be all Dez can do to keep them alive. With help found in the unlikeliest of places, and the most unexpected people turning on them, Dez, Hugo, and their allies will fight for their freedom, and the truth-- but at what cost?