In the shadows of history, the secret beats like a pulse. Vampire sisters survive the shortage of 'clean human blood' caused by the Black Death, but the true poison is the silence that surrounds them. Centuries later, one of their descendants faces the same conflict during the AIDS pandemic in Spain, and discovers that the social condemnation remains the same. And that the love between 'sick' and 'healthy,' humans and vampires, continues to provoke the same terror. What happens when eternity is measured in centuries of silence?