She ran and ran until her throat felt like sandpaper and her breathing sounded like the motor of a car. Who was that person and what did it want? Everyone knew Robyn was a nice kid and never done anything horrible in her life. She shook her head. Get a grip, Robyn told herself. That person was just a bloodthirsty creep. She suddenly remembered Detry. Tears began to spill down her eyes like waterfalls. For the first time in her life, Robyn Farrel couldn't think of anything to make herself feel better,

"Oh Detry!" she sobbed, "maybe this really is my fault!"

The news of Detry's 'tragic accident' ( that is what all the students at Westlake High thought) affected every single student. Detry was really popular, nice and always brightens whichever room she's in. She was a great loss to everyone, including the school.

Robyn was overwhelmed by guilt. The police came to question her yesterday, but Robyn told them nothing. She felt foolish bringing up her strange story, besides, they won't believe her anyway. She was dreading tomorrow, which was Detry's funeral. Basically, she dreaded everything in her life.

"Robyn?"

Her name bought her back to earth. She was in the math class. She looked around the classroom wildly, then turned to her math teacher, Mr Delahay.

"May I ask you that if Jeff has five times as many sisters as brothers, and his sister Claire has three times as many sisters as brothers, how many boys and girls are in the family?

Robyn shook her head. That was such an easy question. She began to tell Mr Delahay the answer, when she found she didn't know what it was.

"I um, uh its…" she began.

"Yes?" he ask.

Robyn couldn't believe it. She had never failed a problem solving question before, especially as easy this one, which is made for junior high students. But her brain felt like cotton candy.

"I DON'T KNOW!" she screamed, getting so frustrate that she banged her head on her desk.

"Robyn," ask Mr Delahay, "are you all right?"

Robyn nodded, but tears fell down her face.

"I know it really hard for you to lose your best friend," continued Mr Delahlay, "so you may be excused to go to the sick bay and get some rest."

Robyn stood up, feeling everyone's eyes on her and headed for the door.

She breathed a sigh of relief as she was in the hallway. But the good news soon turned into bad. Because a cruel laugh filled her head. It sounded full of triumph, anger and greed. It filled Robyn's head and body. She felt pain all over. She stumbled around, and bashed into the wall. She didn't care. She just wanted the pain she felt to stop. Because it hurts so much…

"Robyn? Is everything all right?"