Oh hey, look! That's a nice cave! I think I'll take a quick rest.
The relative warmth of the cave proves to be more comforting than you expected. You manage to drift off to sleep after a quick meal.
You sleep fitfully and without dreaming. As you stir awake, you notice the sun has sunk below the horizon. You must have been asleep a couple hours, but you don’t feel rested at all.
Looking down at your belongings, you notice the cork to the vile you picked up from the trail has been removed and the green liquid is mostly gone. Your eyes move a couple inches further and spot a piece of parchment on the ground with strange sigils scrawled across its face in what looks like the same green substance.
Your right index finger is also crusted in the stuff.