Once upon a time there was curious archeologist named Alicia and she was investigating a old legend as old as Loch ness and the werewolf. Looking at an old ruin she read aloud the story of a person, the last of their kind. They were called the Cela. they could infect others. At dawns first light on the Summer solstices it sealed its power away to be transferred to someone else at a later date. Apparently their rivals, werewolves, were able to avoid the monster hunters but the Cela were all but wiped out.