Then a night he can barely remember leaves him with something he can't explain: lost time, evidence of a life being lived in his body without his knowledge, and a woman named Joss who has his eyes, his memories, and absolutely none of his reservations about using them.

As the full moons stack up and Joss grows more insistent, Jace finds himself navigating a curse with no clean explanation, a mythology professor who isn't surprised by anything, a god who has some explaining to do, and the creeping realization that the ambition he buried out of loyalty to his band didn't disappear. It just found another way out.