"something's not right" much like another idea called haunted house its going to be in a haunted house, they don't know anything is wrong but suddenly small things happened like things are not where they leave them but they think nothing of it. then bigger things start happening and they don't feel safe so they gather up to talk, they agree to leave the house but they are stuck and can't seem to find the exit even though they swear they knew where it was. eventually some get separated from the rest and can't find them anywhere, but something doesn't seem right. among the two groups, there is one demon, not just any demon, but a ghost. a ghost at the form of one of their friends that the ghost killed and morphed into. and there was two, one in each group. one person noticed how something didn't feel right. you can go from here i hope. :)
there was supposed to be two versions but i forgot the second one so dont count on it but i will try and remember it