Sandro, a detective, finds his wife strangled. His girl-friend Tiffany, who works as photographer, makes a "Blow up" from a photo, what Sandro finds beside the victim.
A recent widow has invited a group of family friends to her large and secluded country home. However, what the guests don't know is that the reason they've been assembled is that their host suspects one of them might be her husband's killer and she's intent on uncovering the identity of his murderer.
A film demonstrating steps to take in the event of a nuclear attack. Animated drawings show the effects of atomic explosions in the air and at ground level.
The innkeeper Barnabáš and the teacher Isidor Slovíčko succumb to the lure of old Moreles, to whom the young Taussig sends enthusiastic letters from America.
Don Serafin has a complex: to all the beautiful women always seen with a beard. To remove the complex and try to cure him, his friends will lead to Biarritz.