Dead and Gone

The story takes place with a middle school being torn down, due to the murder and disappearances of kids. Many years later, a high school has been built over the middle school. 7 friends (+1 teacher, +1 sibling) do a charm to be together forever, until something wrong happened. A earthquake transport them and they all go into a alternate dimension where the school still exists, and is haunted by the ghosts of the school's murdered children. The students try to figure out the truth behind the mystery of the cursed school, in order to find their way home and try to survive the shadowy forces that haunt the school.