Plot for opening scene

The scene starts off with the killer in an enmpty room with nothing but a TV where he is watching a horror film. Beside the killer is knife and horror mask which he uses to hide is identity. After watching the horror film the killer then places the gas mask on picking up the knife up and proceeds to leave the dark cold room. The killer then moves slowly into each room with the camera tracking his every movement. The killer slowly moves down the stairs where he is disturbed by a noise, he then hides around the corner of the stairs for his victim to settle down. he then moves into the room that his victim is sitting in and without hesitation plummets the knife several times into the victims back.