The family member in question was always obsessed with strange ideas and notions. She (or he) saw conspiracies everywhere, and for good reason considering the prejudice that the family has faced over the years. This family member always believed that their was some dark and sinister presence behind all of the family's misfortunes, a presence that had harassed the family not just for generations, but for hundreds of generations.
Searching disintegrating records and crumbling ruins, the family member took the character from one part of the world to the other, looking for clues to fit into this vast conspiracy theory, the two continually having to work strange jobs and scrape by an existence in a variety of foreign locations. For a while, the family member seemed to have settled back down, but just when the character was starting to think that perhaps the conspiracy chasing was over, the key was left behind and the family member had vanished. Uncertain of what lies ahead, the character grabs gear for a journey and strikes out to find the family member and the secret of the key.