Docudrama covers the January 30, 1972 civil rights march through Derry, Northern Ireland to protest the policy of British internment without trial. Although the majority of the marchers are Catholic, they are led by the area's Protestant MP Ivan Cooper (Nesbitt), who believes the situation can be handled peacefully. Maj. Gen. Robert Ford (Piggott-Smith) reiterates that the British Army has banned all such marches and that participants are subject to arrest. As the march splinters into factions, the Army fires on the crowd--27 civilians are wounded and 14 died. The re-creation of the event by director Greengrass is stunning at the very least. "Sunday Bloody Sunday" was eulogized in a song by U2.