A musical comedy about one day from the life of five year old Petya's grandfather.

One day, doctors Speransky and Nikulin made an outstanding scientific discovery: they discovered the bacillus of indifference and ignorance. To describe its action, one of them selflessly instills it in himself.

In the city hairdressers' school there are exams. The incapable pupil Kukushkina, having spoiled everything on the head of the next client, asks her suitor - the stylist Edik - to sit in her chair. In love, Edik agrees, and says goodbye to his stylish coke for a long time.

Extraterrestrial Girl visited Earth. Inventor Blinkov fe in love with her. His love has awakened in her new emotions and feelings but she realized that Blinkov can not live in a different world.