Told in flashback as Mieszko lies feverish in his bed just before the Battle of Cedynia, Gniazdo recounts how the revered leader extended Poland's borders, formed an alliance with Emperor Otto I, and ultimately strengthened his country's autonomy by achieving victory during that crucial battle in the year 972.

Wojciech Pszoniakas Mieszko I
Marek Bargiełowskias Czcibór, Mieszko's brother
Wanda Neumannas Dobrawa
Franciszek Pieczkaas Mrokota
Bolesław Płotnickias Ziemiomysł, Mieszko's father
Henryk Bąkas Boleslaw I Okrutny, Dubrawa's father
Tadeusz Białoszczyńskias Markgraf Geron
Janusz Bylczyńskias Markgraf Hodon
Czesław Wołłejkoas Emperor Otto I 'The Great'
Marek Nowicki