In a world where the heartbeat is not only a symbol of life but also a source of unimaginable power, previously-conjoined twin sisters Aria, and the spirit of Lyra find themselves tied together by fate and divided by destiny. Born with the defect of dual hearts, Aria and Lyra possess abilities beyond mortal comprehension, each heartbeat pulsating with the potential to shape the world around them.
Aria, the reserved and introspective sister, harbors a deep sensitivity that makes words stick to her as long as possible. Her gentle touch can soothe the wounded soul and calm the storm within, but beneath her quiet exterior lies a wellspring of untapped potential and courage waiting to be unleashed.
On the other hand, Lyra, the daring and adventurous twin, embraces her aggressive nature with fiery determination. Lyra stands as a formidable force to be reckoned with, her every move echoing the thunderous beat of her powerful spirit and even more delinquent personality.
As Aria and Lyra navigate the complexities of their shared existence, they must confront the shadows of their past and the uncertainties of their future. Sewn together in body and spirit, a world filled with havoc awaits them beyond their known world, and they're ready to cross the threshold.
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.