In 1866, with the country barely recovered from the Civil War, new war breaks out on the western frontier: a clash of cultures between a young, ambitious nation and the Native tribes who have lived on the land for centuries. Colonel Henry Carrington arrives in Wyoming's Powder River Valley to lead the US Army in defending the opening of a new road for gold miners and settlers. Carrington intends to build a fort in the middle of critical hunting grounds, the home of the Lakota. Red Cloud, one of the Lakota's most respected chiefs, and Crazy Horse, a young but visionary warrior, understand full well the implications of this invasion. Throughout this taut saga Michael Punke brings the same immersive, vivid storytelling and historical insight that made his breakthrough debut so memorable. As Ridgeline builds to its epic conclusion, it grapples with essential questions of conquest and justice that still echo today.