Scary movie staring out with a small group of teens (I think). I believe they were babysitting little twin girls, or they were just there. One of the boys from the group sexually assaults and kills one twin while the other his hiding in the closet watching. then he is killed either by the other twin or the group of teens. Later the woman is an adult and is being haunted by the boy and has to save the dead twin who is kind of inprisoned on the other side by her killer