Paris, 1792. Terror reigns as the city writhes in the grip of revolution. Edward Savill, working in London, receives word that his estranged wife Augusta has been killed in France. She leaves behind ten-year-old Charles, who is brought to England. Only when Savill arrives does he discover that Charles is mute. The boy has witnessed horrors, but what terrible secret haunts him so deeply that he is unable to utter a word?