Twins of Evil

The film "Twins of Evil" (1971) tells the story of identical twin sisters Maria and Frieda Gelhorn, who move to live with their stern puritan uncle Gustav Weil after becoming orphaned. The twins resent their uncle's strictness and one of them, Frieda, becomes fascinated by the local Count Karnstein, who has a reputation for being "wicked" and is involved in Satanism and black magic. As Frieda delves deeper into the darkness at Karnstein Castle, she is transformed into a vampire, leading to a cat-and-mouse game between her, her uncle, and the handsome young teacher Anton.