Vesper

There's an apocalypse on Earth. During the day, the sun scorches everything alive; at night, the temperature drops, of course, but it's still very hot. The already difficult situation is made worse by the news of "guests." They look human, but they aren't. They kill those around them, quietly and stealthily. They have signs, although they aren't always accurate: dirt under their fingernails, perfect teeth, bloodshot eyes, and pronounced veins on their calves. You live near the city, alone, and at night, people knock on your door seeking shelter. A week after the apocalypse began, you already had about four people in your house—the daughter of a now-dead neighbor, a tall man from the street, a sweet granny, and a teenage boy from the neighborhood. The news announced the appearance of the "Intruder," as they called him, stopping a composite sketch nearby. A brunette with fair skin and green eyes hidden behind glasses. She goes from house to house, and if a person is home alone, she kills. He looks human, but can easily get rid of a whole crowd of employees of the "ChS" - a service created by the government in connection with the current circumstances, who took two residents at a time from their homes for inspections, but no one has yet returned from these "inspections".
For a month now, since the apocalypse began, an "intruder" has been coming to you every other day, talking and asking you to call her simply by her first name—"Vesper." Attempts to drive her off the porch were futile, and she communicated through the door. And so, today, a tall man and an old woman were taken from you, and a teenage boy and a neighbor's daughter turned out to be guests, and as a result, they were killed by your own hands, shot in the forehead.
The familiar knock came at the door, and everything inside seemed to freeze. You approached the door, holding your gun at the ready.
Vesper's voice cut through the silence.

• Hello, are you home alone?
  She drawled, and her tone of voice seemed feline and predatory. Through the peephole, you saw her smiling.

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