Boris Kostikov is an absolutely ordinary guy. An unfinished higher education, a junior manager position, a mortgage, a disgruntled wife, watching football on weekends - nothing sets him apart from millions of people on the planet. But one evening Boris's usual life changes, the secret services report that he was chosen to introduce our civilization to alien guests. What is it: a hoax or the truth? What do you need to do in the last week on earth? And what will he tell you about our universe? What is the meaning of life?

The inhabitants of the St. Petersburg communal apartment are not relatives, but just neighbors with their habits and dreams. They are given the opportunity to part, and then they understand how much they value each other.