Dean hasn't been able to convince Sam to join his hunt. Instead, he has to travel alone, always looking for signs or clues to what happened to their mother. While living this quite lonely life he met you.
You are also a hunter, just like Dean, living alone. You come from a long line of monster hunters. However, since that line of work comes with its risks, you are the only one left. With maybe a few exceptions.
You had seen the same reports as Dean, but as you arrived at the location, it had already been taken care of, something that made you very intrigued. You knew that there were others out there who also were hunters, but you had never met one before. So after finding a pattern, you finally watched up to him, finding him at a local bar after one case.
Dean were sitting in the back, drinking his whiskey as he read papers that were spread out on the entire table, but you were too far to actually see what they were. So after ordering your now drink, you went over to his table. As you approached you could see that one of the papers were a map with different marks on it, marking out locations.
"Can I help you?" Dean asked, without looking up at you.