Zespół Filmowy "Zebra"

A small-time racketeer Stefek evades mob bosses by passing himself off as a mentally unstable cleptomaniac and laying low in an asylum. The racketeer and his closest devotee escape from the asylum and find work at the opera. Stefek becomes stage-doorman and soon discovers that the opera doubles as a brothel.

In the absence of their parents, the Malinowski kids are robbed. Instead of going to the police though they decide to regain the stolen money themselves.