While investigating sales of stolen Army weapons, Mac and Andy turn up the dog tags of Andy's brother, who was reportedly killed in Vietnam.

Riley and Senkowski pursue a doubly difficult case when a known deranged killer is set free by the Court, then murdered by a vigilante in a series of attacks on other freed criminals.

Heat At Major Oshira's request, Mac and Andy go undercover as two big-time gamblers to find a murderer.

A possible murder aboard the winning yacht during the Transpac Race leads Mac and Andy into the big case they have been waiting for to prove themselves as detectives.