Josh Matthews, returning wounded from Vietnam and deserted by his high school sweetheart, finds renewed hope through Becky O'Donnell, a girl who has matured from an adolescent "pest" into a beautiful young woman. Becky shares her Christian faith and helps Josh rise above his depression to become a respected pastor. Complications arise when his high school flame reappears to win him back, and a cult leader, who calls himself "The Prophet" devises a plan to send his followers to their deaths. Josh must lay aside his clerical robes and resort to using all his Marine training in order to save them.