John Carpenter's Halloween

To sum up this story it's based on a movie called Halloween(John Carpenters). The killer named Michael Myers goes around killing babysitters because of his past. His sister Judith Myers promised to take him Trick-Or-Treating, but she didn't. Instead, she made out with her boyfriend on the couch and brought it up to her room. When young Michael finally walked into the house Judith's boyfriend was already coming down the stair going for the door saying that he'll see her later or text her later. Michael heads up the stairs to his sister's room, he stabs her in the chest multiple times before leaving the house to which his parents are already pulling into the driveway.

You'll have to read more to find out what happens in the story.