The sophisticated thief of art Robert "Cuma" Cumiński is released on probation from the local prison by the corrupt Doctor Wiaderny to organize the theft of the famous Leonardo Da Vinci painting "Lady with Ermine" for the dealer Gruby. Three years ago, Cuma was accidentally arrested by the snoopy detective Wilk after a successful heist in the house of the collector Lehman, but he has not ratted his comrade Julian.

Robert Więckiewiczas Robert 'Cuma' Cumiński
Borys Szycas Julian 'Szerszeń' Paulewicz
Marcin Dorocińskias Łukasz Wilk
Kamilla Baaras Magda
Jan Machulskias Tadeusz Hagen
Jacek Królas Jan 'Werbus' Bednarek
Mieczysław Grąbkaas Mieczysław 'Gruby'
Łukasz Simlatas Marcin Kudra
Halina Łabonarskaas dyrektor muzeum
Jerzy Grałekas Dr. Zenon W. Wiaderny