Bogdan Grzeszczak

Operation Danube was the cover name for the invasion of Czechoslovakia by Warsaw Pact armies in August 1968. The fleet of Polish tanks which arrive to liberate their neighbor, ostensibly threatened by a counter-revolution, includes the old tank nicknamed Ladybird, which is the last to leave the barracks.

A group of social welfare workers led by their new director tries to provide necessary aid to people struggling with various problems.