In the nation's capital, Kate Livingston's respectable life as a government worker is disrupted by an encounter with the insufferable Trevor McDonough, a man she'd hoped never to see again. The Harvard-trained physician had never shown the tiniest flicker of interest in Kate. But despite her misgivings, Kate agrees to Trevor's risky proposal to join his work to find a cure for tuberculosis. However, a shadowy enemy lies in wait, and soon revelations from the past threaten to destroy their careers, their dreams, and even their lives.