In the world of espionage, countries are trying to uncover secrets from their rivals to give them that edge that will make a difference. Favorite targets are often the men and women in the military, who by the nature of their jobs, possess the very secrets they seek. To counter this threat, militaries have developed secret organizations whose main purpose is to protect the loss of classified information. One way they do this is by enlisting the help of ordinary soldiers, sailors and airmen who are used as bait to uncover espionage activities and to provide them with the names of foreign agents. Pursuit chronicles the adventures of one such bait, an Air Force pilot named Joe Fuentes. It is also the story of his courageous wife, Susan, who leaves a comfortable life and a newborn baby to find her husband. Her adventures take her to the limits of her courage.