A perfect storm – that is what the Fallen and their children called it, and what they have been patiently waiting and watching for where Alexandria Grace Marcus is concerned. Through all her trials and tribulations as she returned to the Lord's Nephilim, the dark ones have anticipated such a period in Alex's life. Banked on it, in fact. A time during which they might seize advantage and make it count in their favor – not the Lord's.

Even Alex's dear friend Jackson Campbell sees the coming dark tide. And his observation, that the generals don't march until the foot soldiers have already advanced across the field, resonates deeply with Alex and her brethren. For they feel the shift in the struggle between good and evil just as she does. Something more is looming over the horizon and something, somewhere, is very wrong.

Now, Alexandria and Gaius must join forces with their angelic fathers and fellow Nephilim in ways they have never imagined before, to not only hold back the encroaching tide of evil, but also defeat it. Mankind is counting on their bravery, as well as a new immortal compatriot whom Alex will befriend in startling new ways for both sides – proving, once again, that good will always triumph over evil.