The Canon's Yeoman's Tale is about an alchemist named the Canon and his assistant, the Yeoman. The Canon was once wealthy but lost everything pursuing the mythical Philosopher's Stone through alchemy. His failed experiments left him penniless. Due to their misplaced faith in science, the Canon and Yeoman trick a priest by falsely claiming they can turn objects into silver, robbing the priest who believes due to his faith in God. The tale criticizes how faith can lead men astray whether in religion or pursuits like alchemy.