Time is constant and can not be changed because if someone has traveled into the past then the present is what it is because of it. So Scott has continually claimed. But is that so? Scott's beliefs are challenged by newest member. The only way to find out is to deliberately make a change and see what happens. The guild discovers that they have been wrong all the time. Now they must proceed with caution and new rules for travelers must be created. In spite of their new knowledge the trips continue! One of the new members goes back to 1792 to see how to run a village. He comes back with not only knowledge but with a wife! New Trips, New Members, New challenges!