For six millennia, Cal has fought to guard mankind against the evil he unleashed upon it—his offspring, the Nephilim. Now, in order to avert another Great Flood, he must unite the Sacred Four. Problem is, one of these souls once cost him his grace and shattered his all-too-human heart.

Four years ago, Kleio awakened in an unfamiliar body to find her reality completely altered. Her only desire is to see her husband again. When Cal finally comes for her, she believes her prayers have been answered. Until she realizes the Watchers’ leader is nothing like the passionate angel she remembers.

Cal fights his sinful attraction to the woman who led to his fall, aware that for the world to be saved, the Sacred Four must die. But Kleio is determined to make him feel again. For the first time in centuries, he questions his dedication to his mission. When the floodgates open, will he have the strength to sacrifice everyone he loves or will he damn humanity a second time?