1. It's Halloween, and ghost hunting teenagers wander into an infamous haunted house near a local graveyard, only to find that it's not ghosts they need to fear, but a poisonous gas that warps their memories and puts them at the hands of the delusional and twisted man who lives upstairs.

2. When a disease similar to chicken pox breaks out in a local preschool, it leads to a quarantine. Though it seems harmless at first, it turns out that its symptoms include violent outbreaks that cause the children to break loose and terrorize the town.

3. What seems like an ordinary meditation seminar turns out to be the recruiting ground for an extremist cult that hypnotizes members to commit acts of violence. No one is immune, except Margaret Bradshaw.