Due to a human error in an exercise, artillery fire injures seven Marines, one of whom later dies. The accused is a son of a former commandant of the Marine Corps. Harm and Meg investigate; Meg, with help from Ollie North, finds the truth.

Two Naval aviators die in a crash of an F-14 while using a new fly-by-wire navigation system. Harm and Meg investigate. The vendor of the system blames the pilot. Harm flies both a simulator and a Tomcat; he and Meg discover the cause.