Arriving on an excursion to St. Petersburg, classmates Dana and Lyova witness the theft of the famous "Chizhik-Pyzhik". According to legend, if you make a wish and get a coin on the pedestal of the monument without dropping it into the water, it will surely come true. But "Chizhik" is gone. Does this mean that the guys will never be able to realize their dreams and Lyova's parents will still get divorced, and Dana will not become a famous blogger? Courageous schoolchildren rush in search of kidnappers, hiding from teachers, parents urgently summoned from Yekaterinburg, policemen and even from themselves.... "Peter the Great".

The Lyceum of Arts is shocked by the news of the suicide of a high school student. Alisa, a classmate of the deceased, together with the class decides to remain silent about the possible causes of the incident. Alisa's mother, a professional lawyer, is trying her best to avert trouble.

Fleeing from bullies, twelve-year-old Artyom hides in an attic, where he meets a killer who has already set up his position and prepared for work.

Masha spent her entire 11 years of life with her cosmonaut father at the spaceport. She knows how to fly a plane, a boat, and take responsibility for herself, but she doesn't know how her peers live. To make friends and get used to life on Earth, she goes to a regular school in St. Petersburg, where her incredible adventures begin.