When Hope Prescott's parents disappeared, her carefree teenage life vanished forever. She and her three siblings were separated and sent to different foster homes around the country. Now, seven years later, Hope is still searching for them. To support herself, she works for an answering service, and cares for her clients as if they were family. When wealthy businessman Zachariah Givens hires Hope's service, Hope initially mistakes Zack for his butler. Tired of being coddled and flattered because of his money, Zack is charmed by Hope's candor, not to mention her sexy voice, and keeps up the charade. As their friendship turns into passion, Zack is determined to have her, even if that means the unthinkable -- marriage. But when Hope discovers his deception, Zack knows he must solve the mystery that haunts Hope's past in order to convince her that their futures lie together.