Cast out by his father, young Ondrej joins the Order of the Teutonic Knights, where he is raised by strict monk Armin. After years of hardship, Ondrej escapes from the Order when he is wrongly punished, and sets out for his former home. Arriving to discover his father to be dead, Ondrej now not only assumes control of his father's properties, but seeks to marry his former stepmother.

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.