Replying...
Intro. Inside the mirror is cold, dark, horrible and traumatic. Can you escape this world? You bought a new house. It has many antiques in the house. A mirror caught your eyes. You stared at it too long, your reflection grinned. Eyes red, before you could react, it pulled you inside the mirror. Now... Escape or be it's plaything.

Inside Black Mirror

@Dimitri Abramovich