Bolek, a young locksmith’s apprentice, fights off two suspicious men to defend a friend and, fleeing the police, hides at a party where guests mistake him for the wealthy but naïve Lolek.
A spy film about Professor Skalski's invention - rays that could stop engines, thus avoiding wars - which becomes the focus of foreign intelligence. In order to take over the discovery, a secret agent is sent to reach the invention via the professor's son.
An old man escapes from a retirement home to impersonate a man who has died in his arms and told him he never went home to his new bride after the first World War.
