The story is nothing really special. Nor does it fail. It takes on sort of a treasure hunt aspect, as the main point is to find the ultimate hidden treasure aptly named, "The Vault." It sort of reminds me of One Piece, in that everybody "sets sail" for the ultimate hidden treasure. Though, in Borderlands, everybody gets out on foot (and eventually vehicle) and runs n' guns their way to the treasure. So, that's the sort of general premise as to why everyone is killing each other. Strangely enough, nobody actually seems to know what is actually in The Vault. You (as the main character) receive some sort of divine guidance from a seemingly disembodied talking head that appears to probably only you.