Team 101: The beginning (Naruto fanfic)

Kurayami Ratio has a secret inside of her that no-one knows apart from her and a mystery ninja who killed her whole clan and family. After the only people left in her clan get killed she flees to the leaf village where she thinks she can be protected from the ninja who is after her. But is the leaf village really as safe as her father set it out to be? and who is this mystery ninja that killed all of her clan?