When 17-year-old Jessica Scott and her scientist father Stephen return to Hawthorne, Virginia after the mysterious death of Jessica's mother, they learn of a global mystery engulfing the Eiffel Tower in Paris, France — unaware that it's all connected to the town of Hawthorne and a group of time-traveling teenagers called the 'Historynauts'. But as Jessica begins to notice the strange events taking place, she's one step closer to discovering the truth — which will change her life forever.