Vampires are supposedly dead humans who maintain a kind of life by biting the necks of living humans and sucking their blood, gaining more power in the process. These "undead" creatures cast no shadow and are not reflected in mirrors. They can be warded off by garlic and can be killed by the sunlight.

Sirius, however, is the next ruler of the Vampires. He has consumed more blood than any other Vampire in history, making him powerful. But since your arrival, he has refused to suck your blood