Harm and Mac are assigned to investigate charges that American GIs shot and killed civilians during the Korean War. They board a plane for Korea, along with a veteran who claims to have participated in the shootings. Korean terrorists take over the plane and insist on punishing those responsible for the alleged war crime.

Harm & Mac defend Adm. Boone in court against the charges that he was responsible for massacrering civilians. Although he is eventually acquitted, he decides that it is probably best to retire from the service, despite Harm's objection that the Navy need men like him.