Blind bandit {Assassin story}

Anna was always in the darkness and then she was saved by one man who trained her to be a cold deadly killer, a Assassin. She has become so accustomed to the dark that the light will always blind her. She had been given a gift when she was young to sense her surroundings even when blinded. She wears a white bandanna over her eyes when in the light but she has perfect night vision in the dark. Now a great problem has come to the Assassins. Someone is killing them off one by one and their numbers dropped dramatically. Anna's ability's increase and she discovers that she may be the only one strong enough to defeat the killers, but the big question is: Where are the killers? She has to find the answer soon or everything will end horribly.