Save Me If You Can

Cassey isn't what you call a functional girl. Her mother is a drinker, her father a cheater, her brother is the perfect one of the family and he tries to keep her clean. Because Cassey is the drug user, the loner at school no one gives a second glance to. Not to right in the brain from getting beatings from her mother. So one night when Cassey's mother, father, and brother went out. Cassey witnessed a murder that she came across in a high.
Next thing she knows she wakes up in her bed and see's her dead lifeless body. What happened, she doesn't remember anything. So over the course of the next four years. She acts as if a gaurdian angle to her brother and mother. Her father had left a few months after she died, ran off with another women.
Draven is new to the city and meets Drake Pines. He learns that his older sister had died when she was 18. Died is to little murdered is more like it Drake commented one day.
But the weirdest thing that has happened, he see's a girl watching over Drake and Drakes mother. Who is this girl and why does she look so firmiliar.
Draven and Cassey are thrust into a adventure of trying to figure out who killed her. Can they do it without losing their hearts to eachother?