Jealous of her vapidly "good" sister's popularity, poisonous Viktoria doses pretty Klara's tea with a slow-acting fatal substance. As the latter grows hysterically weak, the former finds success increasingly compromised by guilt, blackmail, and the pesky need to kill others lest she be exposed.
CountryCzechoslovakia
Runtime1 hour 46 minutes
Production year1972
World premiere15 September 1972
Release date
19 September 2024
Czechia
15 September 1972
Czechoslovakia
7 June 1973
Hungary
Also known as
Morgiana, Cerná kocka, Morgiána, a kék szemű macska, Моргиана, 魔格亚纳