“Where the underworld burns, two unlikely souls carry the fate of every world that has ever existed.”

Jignasa has served the Devil faithfully for centuries — feared, merciless, and untouchable as the Sin of Gluttony. She enforces the law of Golveviion with her claws and her will, and she never loses. But when an ancient prophecy names a Speaker — a boy with the voice of a holy book — as the key to everything, the most powerful demon in the underworld must choose between the world she has always known and the one she never knew she was fighting for.