Thalia is the oldest and most powerful vampire on Earth. But her arch enemy, a vampiress named Ona, is sending slayers to kill her.Thalia is the oldest and most powerful vampire on Earth. But her arch enemy, a vampiress named Ona, is sending slayers to kill her.Thalia is the oldest and most powerful vampire on Earth. But her arch enemy, a vampiress named Ona, is sending slayers to kill her.