In its centenary year, the presenter investigates why a new trade border in the Irish Sea has led to violent protests in Northern Ireland, sparking fear of a return to conflict nearly 25 years after the end of the Troubles - a conflict that claimed thousands of lives. Patrick focuses on a new generation born after the ceasefire as he tries to understand what is driving this new wave of unrest, particularly in loyalist communities. He also explores why some feel that a united Ireland could now be on the horizon and how the trauma of Northern Ireland's past is shaping its future