Lilly and Brand's daughter, Caylin, saw her soul mate for the first time when she was fourteen years old. After a simple exchange of smiles, she knew her life was set on a path which would lead Aiden back into her world forever. For three long years, Aiden keeps his distance from Caylin out of respect for her parents' wishes. Being a Watcher who once gave into the dark side of his curse, Aiden uses the time to come to terms with his own demons and strives to become a man worthy enough for the granddaughter of an archangel. Caylin learns that one of the Princes of Hell, Baal, is out to kill...