When a British SAS officer is assassinated in Los Angeles by a member of an IRA splinter group, it is up to District Attorney Ren e Marin to prosecute the killer. But before the proceedings can begin, Marin and Detectives Gibson and Donahue are confronted by a series of terrorist murders designed to force the release of the assassin. With the assistance of SAS Major Andrew Whitney, they find themselves caught up in a desperate race against time to unravel a series of betrayals and secret alliances that reach into the very highest levels of government.