Belle is forced to mourn in secret after her lover, Attorney General Sean Ryan, is murdered in a terrorist plot. When she has an irrational, intense sexual response to the mysterious stranger Jack Caldwell, Belle wonders if it's due to delayed grief for Sean. Sean was the only man she'd ever responded to so completely, after all. When she finds herself submitting wholly to Jack's dominant, demanding manner in bed Belle begins to live on the sharp edge of doubt and uncertainty, even to the point of questioning her own sanity. Because Belle can't let go of the crazy, impossible idea that Sean Ryan and Jack Caldwell are one and the same man. But if Belle persists in her obsession about Sean, Jack will have no choice but to cut all ties with her. He wants Belle for his own . . . and he refuses to share her with a ghost.