The time-traveling medieval knight Godefroy de Montmirail and his servant Jacquouille la Fripouille arrive in 1793, in the middle of the French Revolution, and find themselves caught up in the Reign of Terror. They meet Jacquouillet, the descendant of Jacquouille and public accuser. Godefroy also meets one of his own descendants who is trying to escape the Revolution. Godefroy and his squire help him to escape. They also attempt to find a descendant of the Enchanter, who sent them forward in time in the first place, so that they can go back to their own time.