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.