sister ghost

It's a Girl named Sara that believed in spirit's and that kind of things very much, she had two sisters, her sisters think she's weird. Her parents had a big fight for about money , it was that big fight that her dad broke her mums hand , before police and ambulances came she ran away far as she could, then she find herself somewhere that she never knew or heard about, it was like a forest kinda like that, Sara heard many noises from her back but she only thought , its only a animal. But then *blink* she passed out and find herself somewhere dark that you only could see a light far away. She had many thoughts about her family and herself then *skap* a knife stabbed her in her stomach, she started crying from her pain and she knew it was the end, then before the knife came into her chest close to her heart she thought "bye,mom,bye dad, bye sisters see you afterlife" *skap* she died,she saw her dead body but not the killer, she wanted to come back to life to catch the killer and then go back, with only one of her sisters help,but who?and how?