The Messenger of the Black Prince is set during the Hundred Years' War a period of intense conflict between England and France. The novel follows the adventures of a young messenger who is entrusted with a critical mission by the Black Prince Edward of Woodstock who was a key figure in the English campaigns of the war. The story involves the messenger’s journey through dangerous territories encountering various challenges and adversaries. The plot weaves historical events with fictional elements highlighting themes of bravery loyalty and the complexities of wartime diplomacy.