The alien ship in the rays of the evening sun seemed like a cloud, devoid of clear shapes, iridescent and completely safe. At that moment, Marya Stepanovna, her daughter Leocadia and granddaughter Sashenka, who was sick with a sore throat and was capricious, were in the house. Semensky, Leocadia's husband, has not yet returned from work. A cloud hung over the house for several minutes, suddenly fell on it, enveloped the house like fog, then rose again, picking up speed until it mixed with other clouds and clouds. The house has disappeared...