In the 15th century the Polish-Lithuanian Commonwealth is facing a hard struggle against the neighboring Teutonic Order.Frequent clashes between the two powers finally culminate in 1410 with the Battle of Grunwald.

A tale of a young impoverished nobleman, who with his uncle returns from a war against the order of the Teutonic Knights in Lithuania. He falls in love with a beautiful woman and pledges an oath to bring her "three trophies" from the Teutonic Knights.—Anonymous