Right. Maybe Ruby is trying to get Sam up and running again and sends him on a hunt. She spotted or feels some sort of energy surrounding this town and they check it out... it could be a group of homeless kids in this town, but they're all being picked off one by one by one of their former friends who died or something similar. This could be the line that strings along Sam and Ruby trying to get used to each other and Sam trying to get over his brothers death. :P