Arael, a fallen angel cast from heaven, finds unexpected love with a human man in the mortal world. But their forbidden union births Kael — a child neither angel nor human, marked by an ancient prophecy. When fallen angels descend to destroy Earth and reclaim the child of destiny, Kael must embrace both his celestial and human nature to stand against them. As war erupts between heaven, darkness, and humanity, the fate of the world rests in the hands of the Angel of the Dark.