Jack Travers, a sergeant in the Royal Marines and serving with the Special Boat Squadron SBS, the Marine equivalent of the SAS, is on a mission in Eire. He learns that his younger brother, also serving in the army, is killed when an AED bomb explodes under his Armoured Personnel Carrier in Northern Ireland. Devastated at the loss of his only surviving relative, Jack joins the murky world of espionage as an agent with MI6. In this personna, the ex-marine is soon on the trail of the arms dealer, Henri Argen, who supplied the explosives that killed his brother. Teaming up with a French intelligence officer, Pierre Rahua, the two agents are drawn deeper and deeper into the the nefarious and often dangerous world of gun-runners, terrorists and killers. But Jack is intent on revenge, and woe betide any who stand in his way.