Journalist Peter Taylor explores the impact and legacy of four major acts of terror from the last 30 years. Taylor explores the dramatic events of 10 days in 1987, in which the boat The Eksund carrying a massive cargo of Libyan arms bound for Ireland is intercepted in French waters. Under questioning, the skipper reveals vital information about the IRA's secret arsenal which rocks the British government. In the same week, the IRA is preparing to bomb a Remembrance Day service service in the border town of Enniskillen. This attack will shake the IRA to its core. These two extraordinary events would lead to a transformation of the political landscape in Northern Ireland.