In the pulsing heart of Times Square, Jonathan reappears without having aged a single day. Confused, dressed in the fashion of another era, still holding the letter he was about to deliver, he discovers that the world is no longer his, and that his very existence has become an impossible enigma.
When Professor Claire Anderson, a descendant of the only woman Jonathan ever loved, receives that same letter, her life is pulled into a mystery that defies every law of time. The clues lead to a secret buried among archival documents, old photographs, and a name capable of changing both their destinies: Tesla.