After a hard-fought victory against the Four Great Disasters (Human Error), Menou and her companions are faced with a lingering sense of unease from the words thrown at them by the Pandemonium just before its disappearance. Determined to kill Akari, they set out on a new journey to seek the Sword of Salt. Along the way, they reunite with Menou's former colleague from the convent, Sahara, and head to the Oasis in the Baral Desert to devise a strategy to combat the armed group known as the Iron Chains, who have been engaging in illegal activities. This is the sixth volume of the highly popular comic adaptation that won the GA Bunko Grand Prize, filled with swirling plots and schemes.