Disclaimer: based on the screenplay written by John Carpenter and Debra Hill

Haddonfield, Illinois, 1963:

It's Halloween night. At 35 Lampkin Lane, there's a kid in the kitchen, eating some of the candy he collected by trick-or-treating. As he was eating, he heard the doorbell. Somebody went to answer the door. It was the kid's elder sister. She opened the door, after which she laughed: "Glad you're here..."

He heard her smooching with him, even heard him say between two kisses: "Hey Judy!"

"My parents won't be back till ten." the girl, or Judy, said, "We've got the place all to ourselves!"

"Are you sure we're all alone?" he asked her.

She hummed something for saying yes, but then she remembered: "No... wait, there's still... Could you wait here for a moment?"

The guy sighed, but seemed to give in anyway, as Judy went into the kitchen to see her little brother.

The guy waited inside the doorstep. He saw Judy coming out of the kitchen again, along with a six-year-old kid. The guy looked at the kid and said: "Hey kiddo! Had fun trick-or-treating?"

The kid turned his head to look at him. He didn't reply to what he said, nor did he laugh, or look annoyed even. Judy spoke for him: "He had a good time. He's just a little shy."

"Don't be!" the guy told the kid.

"Come on!" Judy urged the kid, "Time for bed!"

The kid was in his bedroom, sitting on his bed, still wearing his Halloween costume. He didn't feel much like sleeping, but even if he did, his sister was making too noise for anyone to sleep. He's even surprised to not have heard his two-year-old sister crying, which means she wasn't at all bothered with Judy doing whatever it is she's doing in her bedroom. He got out of his bed, put his mask back on, left his room and went back to the kitchen, up to a drawer, which he opened. He withdrew a large butcher knife, after which he heard someone running down the stairs.

"I'll call you tomorrow!" he called back to Judy, who was still up the stairs.

"Promise?" she asked him back.

"Yeah." he replied, as he finally ran by the plastic tombstone which read "Happy Halloween, which was found at the bottom of the stairs, and left the house. Judy then turned and stepped back into her bedroom.

The kid moved slowly up the stairs, into the bedroom door and peered around inside. The sister sat at her night-table brushing her hair, still being completely nude. Slowly, the kid moved into the room. Judy, suddenly sensed a presence, so she turned around. When she saw it was her little brother, she covered her breasts quickly, saying: "Jesus, can't you... what are doing here?"

The kid didn't answer her question. He waited for her to wrap a towel around her and to come closer to him herself. Judy, failing to notice the butcher knife that the kid held, came to him asking: "What's the matter? Can't you sl..."

She couldn't finish her sentence. The kid had made a move with his right arm, to quick for her to realize what just happened. She looked down her belly, only to see that her little brother had just shoved a butcher knife into it. The kid withdrew the knife, only so he could repeat the same move over and over again. Judy kept screaming, begging her brother to stop, but he wouldn't give in. The only result her screaming would have, was to wake up the two-year-old sister in the next room. As Judy started to lose all the energy to keep standing up, she unwillingly lowered herself. This way, she gave her little brother the chance to stab the knife right into her heart.

With her last breaths, she tried to say something to her brother, with an astonished disbelief: "... W... Why...?"

That's when she fell down. The kid turned to the door. He left the room, walked through the hallway, into the next room.

The young girl kept crying, for she sensed something was wrong, but didn't know what it was. Her bigger brother came inside her room. She hoped he would somehow comfort her, let her know that everything is alright, just like her parents, even her bigger sister, always did. Her brother, however, wished that she'd stop crying like that, so he raised his hand, pressed it against her face, hoping that this will somehow stop her from crying. She didn't, so he pressed harder. He even began shaking her head, hoping this will stop soon. Suddenly, he heard something snap. Whatever it was, he didn't know, but at least his younger sister stopped crying.

At ten o'clock, a car pulled into the driveway. A man and a woman, the kid's parents got out and headed to the front door.

"Why are all the lights off?" the woman wondered.

"Judith wouldn't be asleep already?!" the man laughed.

"As long as she remembered to put the kids in bed in time." the woman remarked.

The man opened the front door, after which he reached for something inside: "Where is that switch... Ah, found it!"

He turned the switch which lit up the room. Once the light was on, the woman screamed silly. The man didn't understand why she screamed, but when he turned his head to look into the house, he saw that which caused his wife to scream like that. At the bottom of the stairs, they found both of their daughters, motionless and covered with blood. At their heads stood the plastic tombstone which read "Happy Halloween". Next to the bodies stood the six-year-old kid, holding the butcher knife he used on his sister.