After several years of serving his sentence, Cuma - a notorious art thief is released from prison due to his poor health. It was all arranged by dealer Gruby who plans a heist of the famous Lady with an Ermine by Leonardo da Vinci. Cuma is contracted to steal the painting. He invites his former partner Julian to join the team, not knowing that his best friend is now a policeman and will do anything to prevent the heist. Julian seeks cooperation with an old forger Hagen and a beautiful young art student Magda.