Paris, 1396. Scribe Christine de Pizan is shocked when the Duke of Orleans' fools find a baby, wrapped in rags and covered in sores, abandoned in the palace gardens. Was there really a wicked plan to substitute the child for the queen's own baby daughter and blame the Duchess of Orleans, Valentina Visconti? Who would commit such an evil act, and why?

Accused of being a sorceress, Valentina is the victim of much slander and has powerful enemies at the palace, where rumours of witchcraft and superstition run riot. Convinced of the duchess's innocence, Christine is determined to uncover the truth, and soon makes a number of disturbing discoveries. Could the palace fools be the key to unlocking the mystery?