Katerina Mikhailovna Karetnikova lived the life she deserved. A beloved job, a decent salary, a country house where she could wake up at night and listen to the silence, friends, neighbors… Everything changed when, in her own basement, after going for a jar of jam, she found a door. A door that hadn’t been there before. A door in the wall, behind which there was nothing but earth. A door leading nowhere?
But if there is a door, sooner or later it will open. What will Doctor Karetnikova decide when she is asked for help by those who will be standing on the threshold?