As Dr. Grace Evans worked her way from war zones to natural disasters, a mysterious man was always watching over her.

Co-workers at the international relief organization joked that she had a guardian angel. Over the years, she’d come to trust him, despite not knowing his name or how he knew what he did. But if he said it was too dangerous for her team to stay where they were, they left.

Until one day, Grace goes too far, and her mystery man doesn’t get there in time. Held hostage by a dangerous dictator, there’s only one man who can save her.

And this time, there’s no hiding who he is or why he’s always watched over Grace.