Single mother Maria lives with her son and daughter in a science city, which is being prepared for liquidation. She believes that her physicist husband, who disappeared six years ago during a scientific experiment, is somewhere nearby — just in another dimension. A former colleague of her husband arrives in the city in search of the missing person's records, and Maria has a boyfriend-trucker Stas, ready to take her away with her children and start a new life together. Faced with a choice, a woman can not decide to leave her invisible husband.
The relationship between Katya and her mother cannot be called simple anyway, but here, in the midst of the working day, Katya learns that her mother never flew with her friend to the resort, disappearing from the airport in an unknown direction. Having learned from the doctor the real reason for her mother's strange behavior, Katya not only reunites with her, but also reveals a lot of new things about her mother and herself.
The aftermath of a shocking explosion at the Chernobyl nuclear power station made hundreds of people sacrifice their lives to clean up the site of the catastrophe and to successfully prevent an even bigger disaster that could have turned a large part of the European continent into an uninhabitable exclusion zone. This is their story.