Searching for an inn, the enigmatic traveler Hans stops in a small city on the border between Saxony and Prussia. The next morning, Hans meets an old organ-grinder in the market square and immediately finds himself enmeshed in an intense debate-- on identity and what it is that defines us-- from which he cannot break free. Indefinitely stuck in Wandernburg until his debate with the organ-grinder is concluded, he begins to meet the various characters who populate the town, including a young freethinker named Sophie. Though she is engaged to be married, Sophie and Hans begin a relationship that defies contemporary mores about female sexuality and what can and cannot be said about it.