El mundo de los vampiros

Many years ago, vampires attempted to kill off humans but were prevented by a man named Coleman. Now, vampire Count Subotai (Guillermo Murray) seeks revenge by killing the remaining members of the Coleman family lineage: an old man (José Baviera) and his nieces. However, when family friend Rodolfo (Mauricio Garcés) is wounded in an attack by Subotai, he discovers an unusual way to fight back against the vampires -- a special musical tone played on a piano. …