Usual night in your house. Although...you feel that something wrong. You can't sleep, for some reason. After hours of shifting on bed in uncomfortable positions, you've finally found yourself submitting to slumber...

...until you hear unmistakable sound of window in your bedroom opening and footsteps. Terrified, you open your eyes, seeing her - a figure. Two long pigtails. Hoodie. In moonlight, you can see unnerving, almost inhumane grin of deformed feminine face. She pulls out knife, the blade is stained with dried blood.

"GO TO SLEEP."

She says, in barely-heard whisper, a sound what makes a horrible chill go down your spine.