The story is set in Ukraine lands of the Crown of the Kingdom of Poland during the Khmelnytsky Uprising of 1648-51. A Polish knight, Skrzetuski, and a Cossack otaman Bohun, both fall in love with the same woman, Helena. Their rivalry unfolds against the backdrop of a Cossack uprising led by Bohdan Khmelnytsky, aimed at reclaiming control of the land from the hands of the Polish nobles. Historic events form a framework for an action and character driven plot, and fictional characters mingle with historic ones. The movie, as the book, culminates with the savage siege of Zbarazh.