When Aiko's former sensei appears from the shadows to challenge her, she sets out to confront the ghosts of her past with the help of her deadly companions.When Aiko's former sensei appears from the shadows to challenge her, she sets out to confront the ghosts of her past with the help of her deadly companions.When Aiko's former sensei appears from the shadows to challenge her, she sets out to confront the ghosts of her past with the help of her deadly companions.