In the shadow of the nation's capital, Kate Livingston holds a respectable position as a government statistician when she encounters a rival from her past, the insufferable Trevor McDonough. A Harvard-trained physician, Trevor never showed the tiniest flicker of interest in Kate, and she's bewildered at the way he suddenly seeks her out.

Despite her misgivings, Kate agrees to Trevor's risky proposal to join him in his work to find a cure for tuberculosis, a contagious and deadly disease. As Kate begins to unlock the mysteries of Trevor's past, she realizes there is much more to him than she could have imagined. However, a shadowy enemy lies in wait and Trevor's closely guarded secrets are darker than she ever suspected.

As revelations from the past threaten to destroy their careers, their dreams, and even their lives, Trevor and Kate find themselves in a painfully impossible situation. With everything to lose, they must find the strength to trust that hope and love can prevail over all.