In the era of Rembrandt, Rubens, and Van Dyke, Spain had its own great painter: Diego Velasquez. His assistant is an African slave, Juan, who, by helping his master in his studio in the preparation of paints and stretching of canvasses, becomes an artist himself. Self-taught by watching his master's technique, he is torn between the need to keep his secret, for such work as the creation of art is forbidden to slaves, and the desire to reveal his own talents.