1) In 12th century Cáceres, Spain, a Muslim Kaid ruled the city arrogantly. 2) A Christian king, Alfonso IX, wanted to reconquer the city and sent his best captain to negotiate, but the captain fell in love with the Kaid's daughter instead. 3) The princess helped the captain by arranging secret meetings in an alley and informing him of the city's secret entrance, but the captain betrayed her by telling the Christian king, leading to the city's capture.