What’s the significance of the discovery of a naked Cupid in a 350-year-old painting by Vermeer? After years of study, the hidden figure was revealed in the "Girl Reading a Letter at an Open Window" painting, housed at the Dresden Gemäldegalerie. It was a sensational find. This film traces the many twists and turns that this picture has experienced in its history. The justification for re-exhibiting the painting in its new form is a sensation: the Cupid was apparently painted over after the artist’s death.