I don't know how to unlock the cutscene that says [You find yourself entering a western path... and pestering a newcomer and his tent. Suddenly, your corruption flares up...]
Not this tent. It's in the area on the left of the inn. There should be a plate with a banana next to the tent (or at least close to it, if I remember correctly)
It's the bottom-right tent, but it ONLY appears for a limited time period.
The time period begins after you replace the lever and cross the bridge to the Northern Settlement, and the time period ends after you complete the "orange assignment" quest.