An admiral, a friend of A.J., dies, apparently by suicide; then someone stabs another admiral to death. A.J. refuses to accept the finding of suicide; he, with help from Harm, Mac, Bud, and Harriet, connects the dots. He's the next target.

A Navy frigate fires two warning shots across the bow of a suspect yacht, which has refused to stop when ordered; the second round appears to hit the boat, and it sinks. Harm, Mac, and Bud investigate; they figure out what had happened.