It is a Polish historical drama based on a novel by Henryk Sienkiewicz. It shows the rivalry of Polish knight Skrzetuski and a Cossack ottoman Bohun who both fell in love with the same woman called Helena. The story has been set in Ukraine in the 17th century which was the time of struggle between Cossacks and Polish nobles who were in control of the land. In the series, fictional characters mingle with historical ones. With Fire and Sword turned out to be the most profitable and one of the most watched movies and series in the history of Polish cinematography.