In the 18th century, during the reign of José I of Portugal, the city of Tijuco, located in Minas Gerais, lived the fever of collecting diamonds, which were sent to enrich the Kingdom of Portugal. The Commander Felisberto Caldeira D'Abrantes, charged by the king to manage the diamond mines of Arraial del Tijuco, dominates the territory. When the Commander decides to sell his young slave Xica to a brothel, the young woman takes revenge by stealing a chest of diamonds. Xica and Quiloa, a man in love with her, decide to bury the trunk in order to later have enough money to buy their freedom cards.
Xica meets the new commander appointed by the king, João Fernandes de Oliveira
At Violante and João's engagement party, Sergeant Major Tomaz Cabral, immersed in the happiness of being able to marry his daughter, encourages the commander to ask for anything he would like as a gift, to which he replies that he loves Xica. The slave is sent to the Commander, but refuses to sleep with him. This sharpens João's passion even more, and moved by Xica's beauty, he decides to wait for her to seek him out himself. After their first night of love and many arguments with Violante, the Commander breaks the engagement and decides to confess his love for Xica in public and gives her his letter of freedom. Defying all social norms of the time, he makes the ex-slave his official concubine, publicly assuming their relationship and showering her with riches.