In each episode, Sergei and Nadia Nesterov discuss with a psychologist the problems of a large family: the midlife crisis, Tamara's grandmother's manipulations, the teenage dilemmas of Katya and Vasilisa's daughters, the hyperactivity of Misha's son. But the main thing they come to a specialist for is to save a 17—year marriage.

Senya, the creator of the Lucy smart column, experiments with algorithms, discussing personal topics, family, and people around with Lucy, and tries to make her as human as possible. Lucy quickly becomes something much more than just a column - she turns out to be the only one to whom Senya can entrust her experiences, problems and reflections. Only she knows about all the problems that Senya's daughters faced at school, and only with her does he share his feelings about his relationship with his wife. A smart column helps a man to survive public humiliation in front of the whole family, find the son of the deputy who arranged this humiliation, and cope with the consequences of the irreparable act that Senya committed.

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".