Jemma Redgrave narrates this brand-new original adventure for the 12th Doctor and Clara. In 15th-century France the time travellers encounter a band of soldiers protecting a mysterious young woman. Joan of Arc is troubled by voices telling her things she should not know about: things concerning the Doctor's own people, the Time Lords. Compelled to discover where she is getting the information from, the Doctor and Clara are drawn into danger. Written by George Mann (author of The Engines of War and The House of Winter), the story is narrated by Jemma Redgrave, who plays Kate Lethbridge-Stewart in the TV series.