The year is 1917. We are in the Russian countryside. It is the middle of freezing winter. A pale young, newly educated doctor arrives. Having to deal with one medical challenge after another he soon becomes the center of everyone's attention. To soothe the impressions of human suffering he turns to morphine.

In Imperial Russia, Anna, wife of the officer Karenin, goes to Moscow to visit her brother. On the way, she meets charming cavalry officer Vronsky, to whom she's immediately attracted. But in St. Petersburg’s high society, a relationship like this could destroy a woman’s reputation.

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.