Rye Mallett is a "freight dog," a pilot who'll fly anywhere in the world, at any time, at a moment's notice, through the worst weather. As a fighter pilot in Afghanistan, he escaped death once. Figuring that it's only a matter of time before it catches up with him, he tempts it by taking risks. But one night he takes to the air, when no other pilot would, to deliver a black padlocked box. What awaits him at his destination is a near crash--and a run-in with Dr. Brynn O'Neal. Brynn, a dedicated physician, is under a forty-eight hour deadline to save a patient with the contents of the box Rye delivers. She's lovely to look at, but Rye doesn't trust her. He's volatile and a threat to Brynn's plan. But soon they're reluctantly teamed in a mad race against the clock, the law, and the ruthless individuals who will kill in order to get the precious payload for themselves.