I loved this episode. The 'secret' or 'mystery' to this episode was out of the bottle, so to speak, very early in the episode. What was enjoyable was watching the moral nature of the characters emerge and become better defined.

A young man purchases, for a ridiculously small sum, an imp in a bottle that will grant virtually any financial wish made by the owner of the bottle. The only condition is that the owner must sell it for less than it was purchased for before death, or have his soul condemned to an eternity of damnation.

The protagonist has his moral fortitude tested and emerges with it intact. A fun example of a story where the 'good guy' gets to have his cake and eat it too.