Charles Saku was cursed with a power since he was a young child, forever making him one of the destined. He steals a Hearthstone, one of few weapons of incredible power, capable to either save or destroy life.
Allodia Howe thought the temporary farmhand from a few years ago was long gone. As it turned out, he wasn't, and he had discovered her thread of destiny was woven into the same tapestry as his.
Where magical power and technology collide, legends and myths have become so blended that nobody knows what stories are true and which ones aren't. The ancients tell a story of a hero and his blade that shattered into little pieces that eventually gave way to the Hearthstones, mystical stones that could shape into whatever weapon their bearer desired. Such incredible relics have been lost to time and fairytales, but some of them have emerged once more in search of heroes to take them to battle against the worlds greatest foe, an ancient darker power that was once sealed away, but is near it's eminent release.
With heroes chosen and a battle to be fought and won, is it possible that this darkness that was once the power of a mighty demon can be banished? And this time... For good?
In the epic conclusion to the Devil's Deal series, Freya has one final chance to discover the full potential of her own power, and to use it to restore balance in the universe - once and for all. After the destruction caused by Roisin, Ferya and Torix come to terms with their losses and mistakes... And prepare for a final battle that will change everything.