On the eve of his eighteenth birthday, Aaron is dreaming of a darkly violent landscape. He can hear the sounds of weapons clanging, the screams of the stricken, and another sound that he cannot quite decipher. But as he gazes upward to the sky, he suddenly understands. It is the sound of great wings, beating the air unmercifully as hundreds of armored warriors descend on the battlefield -- the flapping of angels' wings.

Orphaned since birth, Aaron is suddenly discovering new-found -- and sometimes supernatural -- talents. But not until he is approached by two men does he learn the truth about his destiny -- and his own role as a liasion between angels, mortals, and Powers both good and evil -- some of whom are bent on his own destruction....