When Ione discovers a strange box buried in her garden, she doesn't expect it to contain the ring of a long-lost primordial god. But the moment she slips it on, she's bound to Athanasius-lord of death and darkness, and an infuriatingly smug immortal with an agenda of his own. Now tethered to a powerful being who's less "evil overlord" and more "cosmic chaos with a flair for sarcasm," Ione is thrust into a world of ancient magic, looming threats, and a bond that's far more complicated-and thrilling-than she ever imagined.