A Past Life Ghost

A group of five kids with problems in their lives, move to another school to avoid them. Being faced with bullies, hard school work and family issues. One day there's a rumor going around say that the school is haunted, and curiosity get the better of them. They end up meeting a ghost who they speculate is from a past life. But why hasn't this ghost moved on to another life? How do they find out why the ghost hasn't moved on with a ghost who has no memories.

Even if all the ghost can remember is a boy..