Depression, grief and self-hatred have destroyed her since the death of her sister four years ago. Her family has fallen apart and she's pushed away the few friends she had. Now she exists in her own cyclone of loneliness, fighting her demons every day. Sasaki has a chance encounter with a being of magic and power that turns her beliefs upside down. Armed with just the bow her sister gave her, Sasaki leaps in to save the woman before finding out that she's not here to protect, she's looking for recruits. The Angels must take up the fight against the monstrous Fallen who are threatening mankind. Sasaki is forced to fight side by side with people she hates in a vicious underground war to protect those closest to her. She has to push forward against dangers she didn't even know existed while trying to find out the truth about her past, and herself.