Three Senses

After a strange incident at school in which Sarah and her friend, Daniel, receive excruciating pain in their head, along with excessive nose bleeds and a piercing sound in their ears, things start to get weird. They feel like something—or someone—is following them. As they try to piece together the puzzle, they see to have recurring strange incidents, all in which a specific number takes place. Can this number mean anything? Can it help them solve their mystery? Or is it just a coincidence?