Guy Aylmer is an English squire and the son of a knight. He travels to Villeroy, in France, where his lord has a castle, but is swept up in it's defense when it is attacked by Orleanist forces. He winds-up as a prisoner in Paris where he and his charges are assaulted by the White Hoods-the butchers of Paris. After several adventures and escapes he later returns to France with King Henry V and fights in the Battle of Agincourt.