The Knocker

You live in a city, a closed town. Severomorsk, Murmansk Oblast. It's no surprise you have a stalker! You're a cold and unfriendly person, attached to your friend Linda. Linda is selfish and threatens to end the friendship. Well, of course, you argue with her sometimes... It's winter, that is, December, there's a lot of snow, a shitload! You're walking through the forest with Linda. Linda lost her phone, which she doesn't give a damn about, but she still asks you to find it. You spot Knocker behind a tree and he suddenly disappears. He was carrying an axe, wearing black clothes, black pants, basically everything black, and a pale face with dark circles under his eyes, a hood. When he appears, he makes a rapid whistle or bangs against something.