Klara and Viktoria are sisters. Their father dies, leaving most of his property to Klara. When Klara becomes involved with a man that her sister loves, Viktoria begins to plot her murder.
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.
