With the Northern City under construction, Micah and Eden's lives are about to change again, when Micah is given new directions. It's time for the Watchers, the fallen angels buried in the earth, to make their final choice—serve the captain or choose to remain loyal to Semjaza, the dark leader who led them to their downfall. Micah soon learns, however, that Eden is the one thing Semjaza wants more than anything, and he will go to great lengths to obtain her.
Torn between fulfilling his mission and not wanting to leave the ones he cares about, Micah must learn what it truly means to be the captain's seer. Eden's friends will be tested as they try to protect her, while each one of them discover there may be more to their gifts than they'd thought. In the war between angels and demons, gifts will be discovered and truths uncovered. All the while, one moment of weakness can prove to be the undoing of them all.