Below is an order of the narrative stages often found in horror films. Most narratives follow this order:
•An 'original' incident, whereby the stage is set for violence
•Fast-forward a certain amount of months or years now
•Someone awakens the beast or murderer and pays for it with their life
•Enter a group of people usually not more than seven or eight, and all balanced in some 'group dynamic' or another (the idea is that their little problems and affairs &etc with each other can be played out through this coming cycle of violence)
•That crew gets isolated
•Via their own stupidity, that crew starts getting picked off one by mysterious one, in spite of one of them warning the others, etc.
•Eventually, after a series of false escapes and other fun, the 'slasher' is faced, and, if not defeated, at least subdued until the sequel. and hopefully the way it's subdued ties back somehow to that original/inciting incident. and, it's not at all untypical for us to find out about secret children, people who should be dead, etc right around here.
•The coda/epilogue usually suggests that this isn't really over
