Gabe Singleton and Andrew Stoddard were once Naval Academy roommates. Today, Gabe is a country doctor and his friend Andrew has gone from war hero to governor to President of the United States. One day, while the United States is embroiled in a bitter presidential election campaign, Marine One lands on Gabe's Wyoming ranch, and President Stoddard announces that his personal physician has suddenly and mysteriously disappeared-and he desperately needs Gabe to take the man's place.

Now ensconced in the White House medical office, Gabe comes to a disturbing realization: The President is not fit to run the country. Worse, Gabe uncovers evidence that his friend's illness may not be due to natural causes. Who could have administered such a blow? And why? The President's life is at stake, the safety of the world is in jeopardy, and it's up to Gabe to find the answers while time is running out...