In 1901 a young frontiersman named Peter Force comes to New York City and finds a job digging the first subway tunnels. Into his path falls the beautiful mathematical prodigy Cheri-Anne Toledo, whose memories appear to come from another world: the long-forgotten Kingdom of Ohio. Could she have stumbled onto the most dangerous secret imaginable: the key to travelling through time? Peter must find out fast, as the pair are pursued by titans Thomas Edison and J. P. Morgan into the dark labyrinth beneath the metropolis. Peter and Cheri-Anne find themselves wrestling with the nature of history, technology, and the unfolding of time itself.