Sarah Williams is a young Welsh immigrant, coming to Utah to join her sister Mary Ann Perkins and her young family. When the Perkins' are asked to join the San Juan mission to pioneer a trail through Southern Utah, they take Sarah along to help care for the children. But a six-week journey turns into six agonizing months of hard work and toil as the Saints blast their way through a cliff to bring their wagons through what would become the famous Utah landmark "Hole in the Rock." This LDS historical fiction novel is based on the life of the author's great-great-grandfather and accurately depicts the experiences of these intrepid pioneers as they sought to be obedient to a higher call.