In this political thriller, the CIA recruits a renowned immunologist, Lucy Welker, to spy on her estranged father, a corporate scientist suspected of helping Iran develop a bioweapons program. Lucy must operate on her own, forging a relationship with her father and his second family to solve the mystery behind an aggressive virus resembling HIV. With the world on the brink of a virulent epidemic, Lucy unravels an international plot of terror and discovers the shocking truth about her father.