In the aftermath of Sam Delgado and Breeze Tappan's ambush of the posse at Slickside, tempers flare in the Bighorn Basin. During an attempt to stop unchecked violence from breaking out, Governor Agar faces death, saved only when Lauren Davis shoots first. After the Collapse, insulin is in short supply for the 40 thousand diabetics in Wyoming. Word comes down there's a lab north of Boulder, Colorado, that can make insulin in sufficient quantities to keep people alive. Governor Agar handpicks a team-The Fallen Eagle convoy-to retrieve the scientists and their lab in a desperate bid to save the lives of his constituents-at a cost some will consider too high. As Lauren joins Governor Agar's security detail, Sam and Breeze are sent south.There, in the midst of violence, road blocks, and gangs, the Fallen Eagle convoy comes face to face with the depths of human barbarity and a cunning adversary that will do anything to stop them. In the end, however, it comes down to Sam and Breeze. One of them will have to make the supreme sacrifice in a desperate race against the clock and a cunning enemy who will stop at nothing to destroy the Fallen Eagle convoy.