September 1642, and the storm clouds of civil war are gathering over England. After the King raises his standard against his rebellious Parliament, idealistic young Luce Pettitt sees his duty clear — to defend the noble cause of freedom against the Royal tyrant. He doesn't expect that duty to lie with possibly the scruffiest, most disreputable troop of cavalry in the Army of Parliament, commanded by maverick ex-mercenary Hollie Babbitt. Events conspire to bring Hollie and Luce to a wary friendship, in spite of their differences. But in the aftermath of the first bloody battle of the war, will Luce keep faith with his ideals, or his friend?