Since the beginning of time each soul that has walked the earth was bound to its mate. But as the years went on an evil named Samiel appeared. Samiel has severed every pair of bound souls but one. As each pair of bound souls was severed the world became weaker and more undestined. Once the last pair of bound souls is severed Samiel will rule the world. If Samiel succeeds the world will become a hellish place ran by the evilest of evil. The only thing standing in Samiel's way is the last and strongest pair of bound souls, Katherine Campbell and Jacob Jefferson.