In the heart-stopping conclusion to the Timeless saga, Simon and Elizabeth Cross have successfully reset the timeline - but the danger is far from over. The evil Shadow Council, now calling themselves the Continuum, are hell-bent on eliminating the ultimate threat to their existence: young Charlotte Cross.
Simon and Elizabeth, along with their friend and fellow time-traveler Jack Wells, must do everything in their power to protect Charlotte or all will be lost - for them and for the world - for all time.