Morgiana

A jealous woman poisons her beloved sister's tea, then finds her guilt spiralling into blackmail and further murders to keep her crime hidden.

This 1972 Czech mystery-horror drama from director Juraj Herz follows Viktoria, who slips a slow-acting poison into her sister Klara's tea out of jealousy over her popularity. As Klara weakens, Viktoria's guilt spirals into blackmail and further killings to conceal her crime. Iva Janžurová and Josef Abrhám lead the cast in this atmospheric tale of envy and paranoia.