In the story, a fictionalized version of Borges gets the Zahir in his change after paying for a drink in the form of a 20 cents coin. Borges then tells the reader about a train of thought focused on famous coins throughout history and legend, and the fact that a coin symbolizes our free will, since it can be turned into anything. These feverish thoughts keep him awake for a while. The next day, Borges decides to lose the coin. He goes to a faraway neighbourhood in Buenos Aires, while he carefully avoids looking at the street names and numbers, and manages to get rid of the Zahir by paying for another drink in an anonymous bar.