Extaordinary (A Supernatural Fanfic)

Two female hunters keep popping up everywhere and leave town before Sam and Dean can investigate. Tatiana Smith and Francesca Wesson travel just like Sam and Dean but with better resources and a badass-bitch attitude. Later accompanied by Alexandria, Castiel's former companion, the dangerous duo run into the brothers and their sheltered angel. They work a case together and it all goes downhill from there.