The story is placed in the 16th century, during the Turkish oppression of Hungary. Laszlo Babocsai, a young Hungarian warrior defeats Oglu, the Turkish agha of the Koppány nahiyah (today: Törökkoppány, Somogy county, Hungary) in a duel. In his testament, the agha leaves him his daughter and fortune. Laszlo must protect the girl's treasures from the Walloon mercenaries plundering the county. He goes through countless adventures together with his comrades, and in the end he finds out what the real treasure is.