The Traders Exchange is up and Fleetfoot wants to visit it out of pure nostalgia. But when none of her friends have the time to accompany her, she decides to invite somepony with whom she works very often together, but still doesn't know much about - Blaze. She expects a nice, calm day with a few good trades and a tasty hot dog. What Fleetfoot got was something completely different with an interesting result.
Note: The story happens at the same time as the episode in season 4, in which the Main 6 visit the Traders Exchange.