Two apartment house dwellers, although unrelated, share the same name. One is an older man with an appreciation for and love of classical music, while the other is a younger man addicted to swing music. The niece of the older man arrives for a visit and gets into the wrong apartment. Complications arise.
Joasia fiercely pursues employment based solely on her professional skills, nervously rejecting crude advances and disguising herself as unattractive to avoid harassment. When she meets her new, handsome employer Robert Rostalski, she begins to regret her impulsive decision.
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.
