Heaven has a new Head Administrator.

Gabriel is ambitious, upwardly mobile and anxious to be promoted out of the archangel ranks.

And he's going to do it through data.

He has a mandate. Make Heaven Relevant Again. Through his revolutionary Guardian Initiative, he's taken a thousand angels off other duties and assigned them to Earth as Guardian Angels. Their job is to report. Never to interfere. The data must remain uncorrupted.

Cael is one of the brand-new Guardian Angels.

He's assigned to Lily, an eight-year-old little girl with a bright future.

But when Lily is killed and Heaven's protocols prevent Cael from doing anything to protect her, he totally unravels, going down with a severe case of PTSD. Not something that Gabriel, or anyone else in Administration, recognizes.

Cael's only support is a demon from the depths of Hell.

And a human psychiatrist named Naomi.