A mystery Dream

what can I call this.. If I can't call this a dream. I am just a 15 year old young girl with dreams to be fulfilled, I am not ready to die! But no one can change the fate.. I'm already dead! Yet I'm in the human world.. Because.. I have a revenge to take! For myself? For my family? Or for my friends? Several questions that cant be answered! And people dying each day? At the same time?! What is happening?? Who is killing them?! A ghost or a human? It had to be known!