In Isolation (2022) on Netflix

Plot summary

Jane has invited a few close friends to a remote country house for her birthday, and the group has come to get away from it all. Their evening is interrupted when a stranger appears at the door. He is seriously injured and begs them for help. He speaks of a mysterious epidemic that has ravaged a city, and of the looters who pursued him. The friends rally to help him rather than turn him away, and Jane decides to take him in. By helping him she brings the two killers who are after him to her country home, and the friends have to survive the night.