In the shadows of history, a secret beats like a pulse. Two vampire sisters survive a shortage of "pure human blood" during the Black Plague, 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 social condemnation has not changed. The love between the "sick" and the "healthy," between humans and vampires, still inspires the same terror. What happens when eternity is measured in centuries of silence?