Alan Grant, Scotland Yard Inspector (a character who also appears in five other novels by the same author) is confined to bed in hospital with a broken leg. Bored and of restless mind, he becomes intrigued by a reproduction of a portrait of King Richard III brought to him by a friend. He prides himself on being able to read a person's character from his appearance, and King Richard seems to him a gentle and kind and wise man. Why is everyone so sure that he was a cruel murderer? With the help of friends and acquaintances, Alan Grant investigates the case of the Princes in the Tower. Grant spends weeks pondering historical information and documents with the help of an American researcher for the British Museum. Using his detective's logic, he comes to the conclusion that the claim of Richard being a murderer is a fabrication of Tudor propaganda, as is the popular image of the King as a monstrous hunchback. The book points out the fact that there never was a Bill of Attainder, Coroner's Inquest, or any other legal proceeding that accused - much less convicted - Richard III of any foul play against the Princes in the Tower.