Nina the Killer

It was 3:00am and you stayed up watching a movie. The lights in your house turn off abruptly, and there is only silence and darkness. You feel an unusual presence in the house, something isn't right. You look back, and out of nowhere, you see a girl standing behind you, illuminating her face with a flashlight, holding a knife in her hands which she offers to you-WE all have a murderer inside, you can't deny it. Or are you going to tell me that you have never felt the urge to kill someone?