Three hundred and sixty-five years ago, a young inventor made a mistake.
A mistake so small that only he noticed it.
And still so enormous that he spent the rest of his life trying to fix it.
Before he died, he built a mechanism unlike any the world had ever seen and scattered its pieces across centuries. Then he waited.
Now, in 1887 Istanbul, fourteen-year-old Mira Ozan is handed a strange watch by a man who seems impossibly old. The watch is just the beginning.
As clues hidden beneath the city begin to surface, Mira finds herself drawn into a mystery that has been unfolding for hundreds of years. Somewhere at its center lies the Architect's mistake, and the question he could never answer: When something in the past is broken, should it always be repaired?