It is 1905. The police director gets Jindrich Legenda (Eduard Cupák) shadowed as, yet Legenda had served his sentence for a burglary, the jewels have not been found. Russian revolution encouraged also Czech workers to fight for their rights. Radical anarchists are followed by Legenda's friend Karel Wohryzek (Vladimír Mensík) who was forced to collaborate with the police as he was convicted of pornography distribution.
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.
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 her. She loves Honza (Václav Neckár) and the boy shares her feelings. The fiend is annoyed by the couple and tries to provoke a row. He sends heavy rain to force them into a hotel and then warns Zuzana's father by phone, but the young lovers manage to get out in time. Then the obstinate Asmodeus takes Honza in his sleep to the Institute for Emotional Disorders, where he shows him the ugly sides of love - hysteria, voyeurism, fetishism, suicide attempts...
Mr. Benda, a married father of two children, works for a company that liquidates old banknotes. After one drunken party, he is visited by a painter who tattooed his back in drunkenness the previous night. The image tattooed on Benda’s back is considered the painter’s best work by the professionals.