After their beautiful yet brief bonding ceremony in Italy, Schuyler Van Alen and Jack Force are forced to separate. To fulfill the Van Alen Legacy, Schuyler travels to Alexandria to search for Catherine of Siena and the Gate of Promise. But Schuyler quickly discovers that everything she believed about the Gate to be wrong. Meanwhile, Jack makes the difficult decision to return to New York to face his twin and former bondmate, Mimi. But instead of a bitter reunion, he is faced with a choice for which there is no good option.
Mimi, with a most unexpected travel companion in Oliver Hazard-Perry, jets off to Egypt, too, to search for Kingsley Martin, her long lost love. With all roads leading to Hell, Mimi learns that not all love stories have happy endings. But she'll have to put her own feelings aside if she's going to save her crumbling Coven.