People are afraid of the usurer Chazaj and are convinced that he is the bearer of evil. One day Chazaj pays a visit to the poor artist Simon Jordán and asks him to paint his portrait. Simon agrees but as he progresses with the work his mind conjures up terrible thoughts and in the end he commits suicide. The portrait looks lifelike and Chazaj is content with the results. After Chazaj's death the picture changes hands and brings misfortune to all who own it. The last victim is the young painter Roman who buys Chazaj's portrait in a bazaar. He finds a treasure in the frame and begins to live well off it. The comfortable life suits him so well that he rejects his original artistic aims and becomes a painter of fashionable kitsch.
Inspector Cadek from the 13th police station should keep an eye on the released safe-cracker nicknamed The Cat. He rightly suspects that Cat will go and pick up his last loot which the police didn't manage to find and that he will want revenge on Karta who helped get him behind bars. At the hospital, Cat's ex-lover Fróny hopelessly falls for doctor Chrudimský and decides to start a new life. She still refuses to help the inspector in his search for The Cat and Karta.