The story of contemporary Ireland is inseparable from the story of the official republican movement, a story told here for the first time - from the clash between Catholic nationalist and socialist republicanism in the 1960s and '70s through the Workers' Party's eventual rejection of irredentism. A roll-call of influential personalities in the fields of politics, trade unionism and media - many still operating at the highest levels of Irish public life - passed though the ranks of this secretive movement, which never achieved its objectives but had a lasting influence on the landscape of Irish politics.