When all-out wars cost too much, a more precise and efficient profession comes to alive.

The story starts from a retired kanmusume who starts her second career of being a one-shot-one-kill marksman.
However, her successful career brings death to her doorstep and force her to give up the life she used to enjoy a lot.

Abyssals, and even some of her old friends turn against her for the great bounty on her head.

Would Hibiki manage to escape from this storm?