Is love powerful enough to conquer eternal duty?

Ever since his rebirth as a Celestial, Sarilian has held fast to his vows to protect Allaria from the relentless armies of the Void. But when a harrowing battle goes awry, he finds salvation in the most unlikely of sources: a brooding Infernal who has long since given up.

Malorg lost faith in his eternal vigil centuries ago. Why bother resisting the Void's inevitable triumph when all efforts lead to loss? Yet, a chance encounter with a naive Celestial rekindles parts of himself he'd thought forever buried.

Faced with the ever-looming threat of the Void and the ceaseless machinations of their kin, Sarilian and Malorg struggle to nurture their nascent bond. But the Immortal Realm offers little refuge for an Infernal and Celestial, and it will take every ounce of their strength and courage to transcend the shackles of duty and forge a new covenant of the heart…