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.

• Filmové studio Barrandov
• Iva Janžurová
• Josef Abrhám
• Nina Divíšková
• Petr Čepek
• Josef Somr
• Jiří Kodet
• Jiří Lír
• Ivan Palúch