Two brothers escape the Black Death by skipping forward in time, experiencing six centuries of change in six days.

December 1348. The country is in the grip of the Black Death. Brothers John and William are given an unexpected choice: either to go home and spend their last six days in their familiar world, or to search for salvation across the forthcoming centuries- living each one of their remaining days ninety-nine years after the last. They choose the future and find themselves in 1447, ignorant of almost everything going on around them. The year 1546 brings no more comfort, and 1645 challenges them in further unexpected ways. Things they have taken for granted all their lives prove to be short-lived. Can they do something to redeem themselves before the six days are up?