During the American Civil War, young Mike Donovan's life is turned upside down when he is falsely accused of murder. Forced to flee, he adopts the name Mike Steve Blueberry and joins the Union Army. Amid bloody battles, dangerous missions, and military intrigue, he discovers the harsh realities of a divided America. This series follows the early adventures of the future Lieutenant Blueberry, revealing how a rebellious and idealistic young man becomes one of the most iconic figures of the Western genre.