Gonna try to keep this spoiler-free....
I went exploring before getting Dude's Quest and I actually found the area to complete it. Now that Dude has officially given me the quest, I went to the area and it shows the containers to be empty. But I don't have the item on me, and since I didn't know it was a "plot" item when I first found it, I can't figure out if I might have sold it or dropped it somewhere while overencumbered (thinking "oh, this item can't be important").
Does UR definitely list it as a Plot item? If it does, then I shouldn't have been able to drop it or sell it by mistake, right? And if I did sell it or drop it, will it still be wherever I sold/dropped it?
Any help is appreciated, thank you!