A young attractive woman from a rich Mexican family is under a curse that causes her to transform into a Wolf-Woman at night and kill people along the countryside. She falls in love with the doctor she sees (in order to get cured from her curse) who is also a Werewolf, no spoilers here!. A really creepy film!. B/W from 1965 Uncut Spanish Version W/English Subtitles on DVD-R.