Fourteen-year-old Zeke Etienne has a good family, a great best friend, and he does well in school, but he wishes for something more. He dreams about adventures beyond the shimmering walls of New Paris. He dreams about what it would have been like to live before the "Exodus," when the world's great urban centers had been abandoned in favor of the self-contained megacities that had taken their place.
When Zeke's neighborhood rival, Millie Matisse, discovers a strange coin in an abandoned room high in the towers of Paris, his dreams of adventure begin to come true. Zeke and his best friend Leo are pulled into a mystery that started thirty years ago with a boy named Luc Gagnon and his brilliant scientist father. Now the unlikely trio must follow the clues and solve a puzzle that could change the future of Paris forever, before a mysterious group following them in the shadows gets too close