Chaucer's pilgrims, quarrelling amongst themselves, are now in open countryside enjoying the fresh spring weather as they progress slowly towards Canterbury. A motley collection of travellers, they each have their dark secrets, hidden passions and complex lives. As they shelter in a tavern from a sudden April shower they choose the Man of Law to narrate the next tale of fear and sinister dealings.

In August 1358, the Dowager Queen Isabella, mother of King Edward III, the 'She Wolf of France', who betrayed and destroyed her husband because of her adulterous infatuation for Roger Mortimer, lies dying of the pestilence in the sombre fortress of Castle Rising, where her 'loving' son has kept her incarcerated. According the Man of Law, Isabella dies and her body is taken along the Mile End Road and laid to rest in Greyfriars next to the mangled remains of her lover, who has paid dearly for his presumption in loving a queen. Nevertheless, as in life so in death Isabella causes intrigue, violence and murder. Nicholas Chirke, an honest young lawyer, is brought in to investigate the strange events following her death - and quickly finds himself at his wits' end trying to resolve the mysteries before a great scandal unfolds.