A young woman returns to her family's remote hacienda for her aunt's funeral and discovers the estate is under the thrall of Count Karol de Lavud, a centuries-old vampire scheming to claim the property and its bloodline for himself. Germán Robles plays the Count in an icy, elegant performance often credited as Mexican cinema's answer to Christopher Lee's Dracula, directed by Fernando Méndez in a moody, fog-drenched style that made this one of the most influential Mexican horror films of its era.