Distrust Her Shadow (1982)

To Darcy it was just another job All she had to do was deliver a letter. But the assignment was not what it seemed - Darcy was the unwitting messenger in a dangerous blackmail plot! Neve Macalister believed she was involved and to prove it he kidnapped her. "I'm going to see you get all you deserve and more," he threatened. And even when the truth had set Darcy free, she knew she would never escape the haunting memory of her bittersweet captivity.