Sergei, always hanging out on business trips, dreams of being on a "desert island" with his beloved Masha. A pandemic that suddenly hit the world gives him this chance by locking his lovers at home in quarantine. “In a cage,” lovers, having gone through five stages of accepting the inevitable, are forced to get to know each other anew and accept themselves and the world around as it is. And everything would be fine if not for the invasion of aliens.
On the day of her twentieth wedding anniversary, Nadezhda Grushina loses everything that made up the meaning of her life: her businessman husband leaves for another, her grown-up daughter goes abroad. Nadezhda remains alone in her parents' large apartment in the center of St. Petersburg.