A modified assassin who has been programmed to kill every target stumbles on an old secret

Cassidy is a girl full of fears and loneliness, a girl that did nothing wrong but life never seemed to be fair to her. Drowned in her thoughts and depression she is trying to cope with her loss. Things get worst and worst everyday at school she is defined as the "freak" and it seems that she can't escape from her bullies. However there is no escape, she can't escape from either her loss or the way she feels, which that makes her vulnerable. But everything changes when a boy knocked on her door. Will he actually save her or turn her life upside down and make things even worst...