Marketa Lazarová

The sons of the robber clan patriarch Kozlík ambush a small caravan travelling to the nearby Mladá Boleslav in winter. One man escapes, turning out to be the new Bishop of Hennau and an important ally of the Czech king, while the two captives the clan takes are the Bishop's son and his assistant. Mikoláš, one of the sons, encounters the neighboring clan leader Lazar scavenging at the site of the ambush. He threatens to kill Lazar, but spares him as he prays to Christ to forgive Mikoláš. He returns to his settlement where his father, Kozlík, grows furious at him for allowing a man to escape, not killing Lazar, and bringing captives. As Mikolas leaves Kozlik, Adam points out his other mistake in not capturing the old bishop when he had the chance and that their family could've used him as leverage to force the Czech king to comply to their demands. Kozlik overhears this exchange, orders Adam to leave and drags Mikolas back to the main house to confront him. Alexandra takes a liking to the Bishop's young son, Kristian, much to Adam's detest. Read more on Wikipedia.