The Spanish horror film Sister Death, released on Netflix, is not based on a true story but incorporates historical events for dramatic effect.A novice with supernatural powers arrives at a former convent, now a school for girls. The strange events and disturbing situations that torment her will lead her to unravel the skein of secrets that surround the convent and haunt its inhabitants.The Spanish horror film Sister Death, released on Netflix, is not based on a true story but incorporates historical events for dramatic effect.A novice with supernatural powers arrives at a former convent, now a school for girls. The strange events and disturbing situations that torment her will lead her to unravel the skein of secrets that surround the convent and haunt its inhabitants.