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.
Françoise, a French sociology student, moves to Czechoslovakia to write her thesis. She falls in love with Pavel, a professor. But the events of the "Prague Spring" begin and Pavel decides to collaborate. Françoise returns to France and meets up with her militant friends on the eve of the events...
A baleful limping man walks through Prague. He is Asmodeus (Juraj Herz), the fiend of lustfulness, entertaining himself by putting together by magic couples of lovers. He only fails at the swimming pool. Zuzana (Jana Sulcová), the good-looking blonde, ignores the men whom the devil foists off onto...
