A SEAL dies of gunfire during a mission; the government charges the CPO in charge with the murder of his best friend. Harm prosecutes, and he deduces how and why the death took place; he then tells the court that he cannot prove his case.

Intruders enter the US submarine facility at Holy Loch, Scotland, then kidnap the baby son of a single woman Naval officer. The father is a member of the IRA. Harm and Mac provide help in Belfast; amid fireworks and deception they succeed.